diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..2514b0c
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,27 @@
+name: Node.js CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x, 14.x, 15.x]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install dependencies
+        run: npm ci
+      - name: Run tests
+        run: npm test
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index a1ba3f3..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-language: node_js
-node_js:
-  - "10"
-  - "12"
-  - "14"
-notifications:
-  email: false
-sudo: false
diff --git a/package-lock.json b/package-lock.json
index 022aef0..f399195 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -252,37 +252,60 @@
       }
     },
     "@eslint/eslintrc": {
-      "version": "0.4.3",
-      "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.4.3.tgz",
-      "integrity": "sha512-J6KFFz5QCYUJq3pf0mjEcCJVERbzv71PUIDczuh9JkwGEzced6CO5ADLHB1rbf/+oPBtoPfMYNOpGDzCANlbXw==",
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-1.2.0.tgz",
+      "integrity": "sha512-igm9SjJHNEJRiUnecP/1R5T3wKLEJ7pL6e2P+GUSfCd0dGjPYYZve08uzw8L2J8foVHFz+NGu12JxRcU2gGo6w==",
       "dev": true,
       "requires": {
         "ajv": "^6.12.4",
-        "debug": "^4.1.1",
-        "espree": "^7.3.0",
+        "debug": "^4.3.2",
+        "espree": "^9.3.1",
         "globals": "^13.9.0",
         "ignore": "^4.0.6",
         "import-fresh": "^3.2.1",
-        "js-yaml": "^3.13.1",
+        "js-yaml": "^4.1.0",
         "minimatch": "^3.0.4",
         "strip-json-comments": "^3.1.1"
+      },
+      "dependencies": {
+        "argparse": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
+          "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
+          "dev": true
+        },
+        "ignore": {
+          "version": "4.0.6",
+          "resolved": "https://registry.npmjs.org/ignore/-/ignore-4.0.6.tgz",
+          "integrity": "sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg==",
+          "dev": true
+        },
+        "js-yaml": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.0.tgz",
+          "integrity": "sha512-wpxZs9NoxZaJESJGIZTyDEaYpl0FKSA+FB9aJiyemKhMwkxQg63h4T1KJgUGHpTqPDNRcmmYLugrRjJlBtWvRA==",
+          "dev": true,
+          "requires": {
+            "argparse": "^2.0.1"
+          }
+        }
       }
     },
     "@humanwhocodes/config-array": {
-      "version": "0.5.0",
-      "resolved": "https://registry.npmjs.org/@humanwhocodes/config-array/-/config-array-0.5.0.tgz",
-      "integrity": "sha512-FagtKFz74XrTl7y6HCzQpwDfXP0yhxe9lHLD1UZxjvZIcbyRz8zTFF/yYNfSfzU414eDwZ1SrO0Qvtyf+wFMQg==",
+      "version": "0.9.5",
+      "resolved": "https://registry.npmjs.org/@humanwhocodes/config-array/-/config-array-0.9.5.tgz",
+      "integrity": "sha512-ObyMyWxZiCu/yTisA7uzx81s40xR2fD5Cg/2Kq7G02ajkNubJf6BopgDTmDyc3U7sXpNKM8cYOw7s7Tyr+DnCw==",
       "dev": true,
       "requires": {
-        "@humanwhocodes/object-schema": "^1.2.0",
+        "@humanwhocodes/object-schema": "^1.2.1",
         "debug": "^4.1.1",
         "minimatch": "^3.0.4"
       }
     },
     "@humanwhocodes/object-schema": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/@humanwhocodes/object-schema/-/object-schema-1.2.0.tgz",
-      "integrity": "sha512-wdppn25U8z/2yiaT6YGquE6X8sSv7hNMWSXYSSU1jGv/yd6XqjXgTDJ8KP4NgjTXfJ3GbRjeeb8RTV7a/VpM+w==",
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/@humanwhocodes/object-schema/-/object-schema-1.2.1.tgz",
+      "integrity": "sha512-ZnQMnLV4e7hDlUvw8H+U8ASL02SS2Gn6+9Ac3wGGLIe7+je2AeAOxPY+izIPJDfFDb7eDjev0Us8MO1iFRN8hA==",
       "dev": true
     },
     "@istanbuljs/load-nyc-config": {
@@ -322,18 +345,18 @@
       }
     },
     "@sinonjs/fake-timers": {
-      "version": "7.1.2",
-      "resolved": "https://registry.npmjs.org/@sinonjs/fake-timers/-/fake-timers-7.1.2.tgz",
-      "integrity": "sha512-iQADsW4LBMISqZ6Ci1dupJL9pprqwcVFTcOsEmQOEhW+KLCVn/Y4Jrvg2k19fIHCp+iFprriYPTdRcQR8NbUPg==",
+      "version": "9.1.0",
+      "resolved": "https://registry.npmjs.org/@sinonjs/fake-timers/-/fake-timers-9.1.0.tgz",
+      "integrity": "sha512-M8vapsv9qQupMdzrVzkn5rb9jG7aUTEPAZdMtME2PuBaefksFZVE2C1g4LBRTkF/k3nRDNbDc5tp5NFC1PEYxA==",
       "dev": true,
       "requires": {
         "@sinonjs/commons": "^1.7.0"
       }
     },
     "@sinonjs/samsam": {
-      "version": "6.0.2",
-      "resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-6.0.2.tgz",
-      "integrity": "sha512-jxPRPp9n93ci7b8hMfJOFDPRLFYadN6FSpeROFTR4UNF4i5b+EK6m4QXPO46BDhFgRy1JuS87zAnFOzCUwMJcQ==",
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/@sinonjs/samsam/-/samsam-6.1.1.tgz",
+      "integrity": "sha512-cZ7rKJTLiE7u7Wi/v9Hc2fs3Ucc3jrWeMgPHbbTCeVAB2S0wOBbYlkJVeNSL04i7fdhT8wIbDq1zhC/PXTD2SA==",
       "dev": true,
       "requires": {
         "@sinonjs/commons": "^1.6.0",
@@ -425,9 +448,9 @@
       "dev": true
     },
     "ansi-regex": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
-      "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+      "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
       "dev": true
     },
     "ansi-styles": {
@@ -554,12 +577,6 @@
       "resolved": "https://registry.npmjs.org/ast-types/-/ast-types-0.7.8.tgz",
       "integrity": "sha1-kC0uDWDQcb3NRtwRXhgJ7RHBOKk="
     },
-    "astral-regex": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-2.0.0.tgz",
-      "integrity": "sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==",
-      "dev": true
-    },
     "babel-runtime": {
       "version": "6.26.0",
       "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.26.0.tgz",
@@ -705,15 +722,16 @@
       "dev": true
     },
     "chai": {
-      "version": "4.3.4",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-4.3.4.tgz",
-      "integrity": "sha512-yS5H68VYOCtN1cjfwumDSuzn/9c+yza4f3reKXlE5rUg7SFcCEy90gJvydNgOYtblyf4Zi6jIWRnXOgErta0KA==",
+      "version": "4.3.6",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.3.6.tgz",
+      "integrity": "sha512-bbcp3YfHCUzMOvKqsztczerVgBKSsEijCySNlHHbX3VG1nskvqjz5Rfso1gGwD6w6oOV3eI60pKuMOV5MV7p3Q==",
       "dev": true,
       "requires": {
         "assertion-error": "^1.1.0",
         "check-error": "^1.0.2",
         "deep-eql": "^3.0.1",
         "get-func-name": "^2.0.0",
+        "loupe": "^2.3.1",
         "pathval": "^1.1.1",
         "type-detect": "^4.0.5"
       }
@@ -776,9 +794,9 @@
       "dev": true
     },
     "chokidar": {
-      "version": "3.5.2",
-      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.2.tgz",
-      "integrity": "sha512-ekGhOnNVPgT77r4K/U3GDhu+FQ2S8TnK/s2KbIGXi0SZWuwkZ2QNyfWdZW+TVfn84DpEP7rLeCt2UI6bJ8GwbQ==",
+      "version": "3.5.3",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.3.tgz",
+      "integrity": "sha512-Dr3sfKRP6oTcjf2JmUmFJfeVMvXBdegxB0iVQ5eb2V10uFJUCAS8OByZdVAyVb8xXNz3GjjTgj9kLWsZTqE6kw==",
       "dev": true,
       "requires": {
         "anymatch": "~3.1.2",
@@ -902,9 +920,9 @@
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     },
     "debug": {
-      "version": "4.3.2",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.2.tgz",
-      "integrity": "sha512-mOp8wKcvj7XxC78zLgw/ZA+6TSgkoE2C/ienthhRD298T7UNwAg9diBpLRxC0mOezLl4B0xV7M0cCO6P/O0Xhw==",
+      "version": "4.3.3",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.3.tgz",
+      "integrity": "sha512-/zxw5+vh1Tfv+4Qn7a5nsbcJKPaSvCDhojn6FEl9vupwK2VCSDtEiEtqr8DFtzYFOdz63LBkxec7DYuc2jon6Q==",
       "requires": {
         "ms": "2.1.2"
       }
@@ -916,9 +934,9 @@
       "dev": true
     },
     "deep-clone-merge": {
-      "version": "1.5.2",
-      "resolved": "https://registry.npmjs.org/deep-clone-merge/-/deep-clone-merge-1.5.2.tgz",
-      "integrity": "sha512-L7uj428fAzPsSZoMmEH8QT62bOd9ZAifYo9c1H5omewOxQdPV0khjX8q4grPsuvMNo7X7B6BmDQPiLg3LBvzyA=="
+      "version": "1.5.4",
+      "resolved": "https://registry.npmjs.org/deep-clone-merge/-/deep-clone-merge-1.5.4.tgz",
+      "integrity": "sha512-Gb/b8aAFUeX/ZkQwfpYlzVXaUOnHj0jPmh8uwF0eBGhAuFMZA1IxeuSzLGG4B1lzrp0SZsd3UhL6zvhDY7l6ZQ=="
     },
     "deep-eql": {
       "version": "3.0.1",
@@ -1037,15 +1055,6 @@
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       "dev": true
     },
-    "enquirer": {
-      "version": "2.3.6",
-      "resolved": "https://registry.npmjs.org/enquirer/-/enquirer-2.3.6.tgz",
-      "integrity": "sha512-yjNnPr315/FjS4zIsUxYguYUPP2e1NK4d7E7ZOLiyYCcbFBiTMyID+2wvm2w6+pZ/odMA7cRkjhsPbltwBOrLg==",
-      "dev": true,
-      "requires": {
-        "ansi-colors": "^4.1.1"
-      }
-    },
     "error-ex": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/error-ex/-/error-ex-1.3.2.tgz",
@@ -1176,61 +1185,59 @@
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     },
     "eslint": {
-      "version": "7.32.0",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-7.32.0.tgz",
-      "integrity": "sha512-VHZ8gX+EDfz+97jGcgyGCyRia/dPOd6Xh9yPv8Bl1+SoaIwD+a/vlrOmGRUyOYu7MwUhc7CxqeaDZU13S4+EpA==",
+      "version": "8.10.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-8.10.0.tgz",
+      "integrity": "sha512-tcI1D9lfVec+R4LE1mNDnzoJ/f71Kl/9Cv4nG47jOueCMBrCCKYXr4AUVS7go6mWYGFD4+EoN6+eXSrEbRzXVw==",
       "dev": true,
       "requires": {
-        "@babel/code-frame": "7.12.11",
-        "@eslint/eslintrc": "^0.4.3",
-        "@humanwhocodes/config-array": "^0.5.0",
+        "@eslint/eslintrc": "^1.2.0",
+        "@humanwhocodes/config-array": "^0.9.2",
         "ajv": "^6.10.0",
         "chalk": "^4.0.0",
         "cross-spawn": "^7.0.2",
-        "debug": "^4.0.1",
+        "debug": "^4.3.2",
         "doctrine": "^3.0.0",
-        "enquirer": "^2.3.5",
         "escape-string-regexp": "^4.0.0",
-        "eslint-scope": "^5.1.1",
-        "eslint-utils": "^2.1.0",
-        "eslint-visitor-keys": "^2.0.0",
-        "espree": "^7.3.1",
+        "eslint-scope": "^7.1.1",
+        "eslint-utils": "^3.0.0",
+        "eslint-visitor-keys": "^3.3.0",
+        "espree": "^9.3.1",
         "esquery": "^1.4.0",
         "esutils": "^2.0.2",
         "fast-deep-equal": "^3.1.3",
         "file-entry-cache": "^6.0.1",
         "functional-red-black-tree": "^1.0.1",
-        "glob-parent": "^5.1.2",
+        "glob-parent": "^6.0.1",
         "globals": "^13.6.0",
-        "ignore": "^4.0.6",
+        "ignore": "^5.2.0",
         "import-fresh": "^3.0.0",
         "imurmurhash": "^0.1.4",
         "is-glob": "^4.0.0",
-        "js-yaml": "^3.13.1",
+        "js-yaml": "^4.1.0",
         "json-stable-stringify-without-jsonify": "^1.0.1",
         "levn": "^0.4.1",
         "lodash.merge": "^4.6.2",
         "minimatch": "^3.0.4",
         "natural-compare": "^1.4.0",
         "optionator": "^0.9.1",
-        "progress": "^2.0.0",
-        "regexpp": "^3.1.0",
-        "semver": "^7.2.1",
-        "strip-ansi": "^6.0.0",
+        "regexpp": "^3.2.0",
+        "strip-ansi": "^6.0.1",
         "strip-json-comments": "^3.1.0",
-        "table": "^6.0.9",
         "text-table": "^0.2.0",
         "v8-compile-cache": "^2.0.3"
       },
       "dependencies": {
-        "@babel/code-frame": {
-          "version": "7.12.11",
-          "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.12.11.tgz",
-          "integrity": "sha512-Zt1yodBx1UcyiePMSkWnU4hPqhwq7hGi2nFL1LeA3EUl+q2LQx16MISgJ0+z7dnmgvP9QtIleuETGOiOH1RcIw==",
-          "dev": true,
-          "requires": {
-            "@babel/highlight": "^7.10.4"
-          }
+        "ansi-regex": {
+          "version": "5.0.1",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
+          "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
+          "dev": true
+        },
+        "argparse": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
+          "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
+          "dev": true
         },
         "cross-spawn": {
           "version": "7.0.3",
@@ -1249,6 +1256,24 @@
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           "dev": true
         },
+        "glob-parent": {
+          "version": "6.0.2",
+          "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-6.0.2.tgz",
+          "integrity": "sha512-XxwI8EOhVQgWp6iDL+3b0r86f4d6AX6zSU55HfB4ydCEuXLXc5FcYeOu+nnGftS4TEju/11rt4KJPTMgbfmv4A==",
+          "dev": true,
+          "requires": {
+            "is-glob": "^4.0.3"
+          }
+        },
+        "js-yaml": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.0.tgz",
+          "integrity": "sha512-wpxZs9NoxZaJESJGIZTyDEaYpl0FKSA+FB9aJiyemKhMwkxQg63h4T1KJgUGHpTqPDNRcmmYLugrRjJlBtWvRA==",
+          "dev": true,
+          "requires": {
+            "argparse": "^2.0.1"
+          }
+        },
         "levn": {
           "version": "0.4.1",
           "resolved": "https://registry.npmjs.org/levn/-/levn-0.4.1.tgz",
@@ -1285,15 +1310,6 @@
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           "dev": true
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-        "semver": {
-          "version": "7.3.5",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.5.tgz",
-          "integrity": "sha512-PoeGJYh8HK4BTO/a9Tf6ZG3veo/A7ZVsYrSA6J8ny9nb3B1VrpkuN+z9OE5wfE5p6H4LchYZsegiQgbJD94ZFQ==",
-          "dev": true,
-          "requires": {
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@@ -1309,6 +1325,15 @@
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           "dev": true
         },
+        "strip-ansi": {
+          "version": "6.0.1",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
+          "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^5.0.1"
+          }
+        },
         "type-check": {
           "version": "0.4.0",
           "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -1330,59 +1355,61 @@
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-      "version": "5.1.1",
-      "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-5.1.1.tgz",
-      "integrity": "sha512-2NxwbF/hZ0KpepYN0cNbo+FN6XoK7GaHlQhgx/hIZl6Va0bF45RQOOwhLIy8lQDbuCiadSLCBnH2CFYquit5bw==",
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@@ -3537,55 +3503,6 @@
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-      "resolved": "https://registry.npmjs.org/table/-/table-6.7.2.tgz",
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-      "dev": true,
-      "requires": {
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-        "lodash.clonedeep": "^4.5.0",
-        "lodash.truncate": "^4.4.2",
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-        "string-width": "^4.2.3",
-        "strip-ansi": "^6.0.1"
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-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.6.3.tgz",
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-          "dev": true,
-          "requires": {
-            "fast-deep-equal": "^3.1.1",
-            "json-schema-traverse": "^1.0.0",
-            "require-from-string": "^2.0.2",
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-          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
-          "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
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-        "strip-ansi": {
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-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
-          "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-          "dev": true,
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       "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-6.0.0.tgz",
@@ -3701,9 +3618,9 @@
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-      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.1.tgz",
-      "integrity": "sha512-hzSoAVtJF+3ZtiFX0VgfFPHEDRm7Y/QPjGyNo4TVdnDTdft3tr8hEkD25a1jC+TjTuE7tkHGKkhwCgs9dgBB2g=="
+      "version": "1.13.2",
+      "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.13.2.tgz",
+      "integrity": "sha512-ekY1NhRzq0B08g4bGuX4wd2jZx5GnKz6mKSqFL4nqBlfyMGiG10gDFhDTMEfYmDL6Jy0FUIZp7wiRB+0BP7J2g=="
     },
     "unicode-properties": {
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@@ -3791,9 +3708,9 @@
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     "workerpool": {
-      "version": "6.1.5",
-      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.1.5.tgz",
-      "integrity": "sha512-XdKkCK0Zqc6w3iTxLckiuJ81tiD/o5rBE/m+nXpRCB+/Sq4DqkfXZ/x0jW02DG1tGsfUGXbTJyZDP+eu67haSw==",
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.2.0.tgz",
+      "integrity": "sha512-Rsk5qQHJ9eowMH28Jwhe8HEbmdYDX4lwoMWshiCXugjtHqMD9ZbiqSDLxcsfdqsETPzVUtX5s1Z5kStiIM6l4A==",
       "dev": true
     },
     "wrap-ansi": {
@@ -3875,12 +3792,6 @@
       "resolved": "",
       "dev": true
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-    "yallist": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
-      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
-      "dev": true
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     "yargs": {
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       "resolved": "https://registry.npmjs.org/yargs/-/yargs-16.2.0.tgz",
@@ -3923,9 +3834,9 @@
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       "dependencies": {
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-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-6.2.0.tgz",
-          "integrity": "sha512-c7wVvbw3f37nuobQNtgsgG9POC9qMbNuMQmTCqZv23b6MIz0fcYpBiOlv9gEN/hdLdnZTDQhg6e9Dq5M1vKvfg==",
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-6.3.0.tgz",
+          "integrity": "sha512-Gmy6FhYlCY7uOElZUSbxo2UCDH8owEk996gkbrpsgGtrJLM3J7jGxl9Ic7Qwwj4ivOE5AWZWRMecDdF7hqGjFA==",
           "dev": true
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diff --git a/package.json b/package.json
index cd1f463..022c1fb 100644
--- a/package.json
+++ b/package.json
@@ -25,20 +25,20 @@
   "homepage": "https://github.com/HughePaul/xml-to-pdf",
   "dependencies": {
     "concat-stream": "^2.0.0",
-    "debug": "^4.3.2",
-    "deep-clone-merge": "^1.5.2",
+    "debug": "^4.3.3",
+    "deep-clone-merge": "^1.5.4",
     "hogan.js": "^3.0.2",
     "pdfkit": "^0.12.3",
-    "underscore": "^1.13.1",
+    "underscore": "^1.13.2",
     "xml2js": "^0.4.23"
   },
   "devDependencies": {
-    "chai": "^4.3.4",
-    "eslint": "^7.32.0",
-    "mocha": "^9.1.2",
+    "chai": "^4.3.6",
+    "eslint": "^8.10.0",
+    "mocha": "^9.2.1",
     "npm-run-all": "^4.0.2",
     "nyc": "^15.1.0",
-    "sinon": "^11.1.2",
+    "sinon": "^13.0.1",
     "sinon-chai": "^3.7.0"
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diff --git a/test/unit/fixtures/example-node15.pdf b/test/unit/fixtures/example-node15.pdf
new file mode 100644
index 0000000..3ba50dc
Binary files /dev/null and b/test/unit/fixtures/example-node15.pdf differ