diff --git a/package-lock.json b/package-lock.json
index 743fd9c..7c3df0e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -69,6 +69,16 @@
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+      "resolved": "https://registry.npmjs.org/array-includes/-/array-includes-3.0.3.tgz",
+      "integrity": "sha1-GEtI9i2S10UrsxsyMWXH+L0CJm0=",
+      "dev": true,
+      "requires": {
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+        "es-abstract": "^1.7.0"
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       "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
@@ -303,9 +313,9 @@
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-      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.8.tgz",
-      "integrity": "sha1-5zFTHKLt4n0YgiJCfaF4IdaP9Pw=",
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
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@@ -322,6 +332,15 @@
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+      "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.3.tgz",
+      "integrity": "sha512-3MqfYKj2lLzdMSf8ZIZE/V+Zuy+BgD6f164e8K2w7dgnpKArBDerGYpM46IYYcjnkdPNMjPk9A6VFB8+3SKlXQ==",
+      "dev": true,
+      "requires": {
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+      }
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@@ -369,6 +388,31 @@
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+      "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.13.0.tgz",
+      "integrity": "sha512-vDZfg/ykNxQVwup/8E1BZhVzFfBxs9NqMzGcvIJrqg5k2/5Za2bWo40dK2J1pgLngZ7c+Shh8lwYtLGyrwPutg==",
+      "dev": true,
+      "requires": {
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+        "function-bind": "^1.1.1",
+        "has": "^1.0.3",
+        "is-callable": "^1.1.4",
+        "is-regex": "^1.0.4",
+        "object-keys": "^1.0.12"
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+    "es-to-primitive": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.2.0.tgz",
+      "integrity": "sha512-qZryBOJjV//LaxLTV6UC//WewneB3LcXOL9NP++ozKVXsIIIpm/2c13UDiD9Jp2eThsecw9m3jPqDwTyobcdbg==",
+      "dev": true,
+      "requires": {
+        "is-callable": "^1.1.4",
+        "is-date-object": "^1.0.1",
+        "is-symbol": "^1.0.2"
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@@ -504,50 +548,51 @@
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       "dev": true,
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+        "eslint-restricted-globals": "^0.1.1"
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-      "resolved": "https://registry.npmjs.org/eslint-import-resolver-node/-/eslint-import-resolver-node-0.3.1.tgz",
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+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/eslint-import-resolver-node/-/eslint-import-resolver-node-0.3.2.tgz",
+      "integrity": "sha512-sfmTqJfPSizWu4aymbPr4Iidp5yKm8yDkHp+Ir3YiTHiiDfxh69mOUsmiqW6RZ9zRXFaF64GtYmN7e+8GHBv6Q==",
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-        "debug": "2.6.8",
-        "resolve": "1.4.0"
+        "debug": "^2.6.9",
+        "resolve": "^1.5.0"
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-      "resolved": "https://registry.npmjs.org/eslint-module-utils/-/eslint-module-utils-2.1.1.tgz",
-      "integrity": "sha512-jDI/X5l/6D1rRD/3T43q8Qgbls2nq5km5KSqiwlyUbGo5+04fXhMKdCPhjwbqAa6HXWaMxj8Q4hQDIh7IadJQw==",
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+      "resolved": "https://registry.npmjs.org/eslint-module-utils/-/eslint-module-utils-2.4.0.tgz",
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-        "debug": "2.6.8",
-        "pkg-dir": "1.0.0"
+        "debug": "^2.6.8",
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-      "version": "2.8.0",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-import/-/eslint-plugin-import-2.8.0.tgz",
-      "integrity": "sha512-Rf7dfKJxZ16QuTgVv1OYNxkZcsu/hULFnC+e+w0Gzi6jMC3guQoWQgxYxc54IDRinlb6/0v5z/PxxIKmVctN+g==",
+      "version": "2.17.2",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-import/-/eslint-plugin-import-2.17.2.tgz",
+      "integrity": "sha512-m+cSVxM7oLsIpmwNn2WXTJoReOF9f/CtLMo7qOVmKd1KntBy0hEcuNZ3erTmWjx+DxRO0Zcrm5KwAvI9wHcV5g==",
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-        "contains-path": "0.1.0",
-        "debug": "2.6.8",
+        "array-includes": "^3.0.3",
+        "contains-path": "^0.1.0",
+        "debug": "^2.6.9",
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-        "eslint-import-resolver-node": "0.3.1",
-        "eslint-module-utils": "2.1.1",
-        "has": "1.0.1",
-        "lodash.cond": "4.5.2",
-        "minimatch": "3.0.4",
-        "read-pkg-up": "2.0.0"
+        "eslint-import-resolver-node": "^0.3.2",
+        "eslint-module-utils": "^2.4.0",
+        "has": "^1.0.3",
+        "lodash": "^4.17.11",
+        "minimatch": "^3.0.4",
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@@ -556,65 +601,14 @@
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           "requires": {
-            "esutils": "2.0.2",
-            "isarray": "1.0.0"
+            "esutils": "^2.0.2",
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-          "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
-          "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
+        "lodash": {
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+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.11.tgz",
+          "integrity": "sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==",
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@@ -744,13 +738,12 @@
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-      "resolved": "https://registry.npmjs.org/find-up/-/find-up-1.1.2.tgz",
-      "integrity": "sha1-ay6YIrGizgpgq2TWEOzK1TyyTQ8=",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",
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-        "path-exists": "2.1.0",
-        "pinkie-promise": "2.0.1"
+        "locate-path": "^2.0.0"
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@@ -781,23 +774,13 @@
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-      "integrity": "sha1-+RcExT0bRh+JNFKwwwfZmXZHq2s=",
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-8.0.1.tgz",
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-        "jsonfile": "4.0.0",
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-          "requires": {
-            "graceful-fs": "4.1.11"
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+        "graceful-fs": "^4.1.2",
+        "jsonfile": "^4.0.0",
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@@ -807,9 +790,9 @@
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-      "integrity": "sha1-FhdnFMgBeY5Ojyz391KUZ7tKV3E=",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
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@@ -913,12 +896,12 @@
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-      "integrity": "sha1-hGFzP1OLCDfJNh45qauelwTcLyg=",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/has/-/has-1.0.3.tgz",
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       "dev": true,
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@@ -936,6 +919,12 @@
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+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.0.tgz",
+      "integrity": "sha1-uhqPGvKg/DllD1yFA2dwQSIGO0Q=",
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@@ -1087,6 +1076,18 @@
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+      "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.1.4.tgz",
+      "integrity": "sha512-r5p9sxJjYnArLjObpjA4xu5EKI3CuKHkJXMhT7kwbpUyIFD1n5PMAsoPvWnvtZiNz7LjkYDRZhd7FlI0eMijEA==",
+      "dev": true
+    },
+    "is-date-object": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/is-date-object/-/is-date-object-1.0.1.tgz",
+      "integrity": "sha1-mqIOtq7rv/d/vTPnTKAbM1gdOhY=",
+      "dev": true
+    },
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@@ -1125,6 +1126,15 @@
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+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/is-regex/-/is-regex-1.0.4.tgz",
+      "integrity": "sha1-VRdIm1RwkbCTDglWVM7SXul+lJE=",
+      "dev": true,
+      "requires": {
+        "has": "^1.0.1"
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@@ -1139,6 +1149,15 @@
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+      "resolved": "https://registry.npmjs.org/is-symbol/-/is-symbol-1.0.2.tgz",
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+      "dev": true,
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+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
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+      "requires": {
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@@ -1247,6 +1274,18 @@
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+      "resolved": "https://registry.npmjs.org/load-json-file/-/load-json-file-2.0.0.tgz",
+      "integrity": "sha1-eUfkIUmvgNaWy/eXvKq8/h/inKg=",
+      "dev": true,
+      "requires": {
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+        "parse-json": "^2.2.0",
+        "pify": "^2.0.0",
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+      "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.1.1.tgz",
+      "integrity": "sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==",
+      "dev": true
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-      "integrity": "sha1-PBrfhx6pzWyUMbbqK9dKD/BVxME=",
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz",
+      "integrity": "sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==",
       "dev": true
     },
     "performance-now": {
@@ -1522,12 +1552,12 @@
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     "pkg-dir": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-1.0.0.tgz",
-      "integrity": "sha1-ektQio1bstYp1EcFb/TpyTFM89Q=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-2.0.0.tgz",
+      "integrity": "sha1-9tXREJ4Z1j7fQo4L1X4Sd3YVM0s=",
       "dev": true,
       "requires": {
-        "find-up": "1.1.2"
+        "find-up": "^2.1.0"
       }
     },
     "prelude-ls": {
@@ -1568,6 +1598,27 @@
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
       "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA=="
     },
+    "read-pkg": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/read-pkg/-/read-pkg-2.0.0.tgz",
+      "integrity": "sha1-jvHAYjxqbbDcZxPEv6xGMysjaPg=",
+      "dev": true,
+      "requires": {
+        "load-json-file": "^2.0.0",
+        "normalize-package-data": "^2.3.2",
+        "path-type": "^2.0.0"
+      }
+    },
+    "read-pkg-up": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/read-pkg-up/-/read-pkg-up-2.0.0.tgz",
+      "integrity": "sha1-a3KoBImE4MQeeVEP1en6mbO1Sb4=",
+      "dev": true,
+      "requires": {
+        "find-up": "^2.0.0",
+        "read-pkg": "^2.0.0"
+      }
+    },
     "readable-stream": {
       "version": "2.3.3",
       "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.3.tgz",
@@ -1638,12 +1689,12 @@
       }
     },
     "resolve": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.4.0.tgz",
-      "integrity": "sha512-aW7sVKPufyHqOmyyLzg/J+8606v5nevBgaliIlV7nUpVMsDnoBGV/cbSLNjZAg9q0Cfd/+easKVKQ8vOu8fn1Q==",
+      "version": "1.11.0",
+      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.11.0.tgz",
+      "integrity": "sha512-WL2pBDjqT6pGUNSUzMw00o4T7If+z4H2x3Gz893WoUQ5KW8Vr9txp00ykiP16VBaZF5+j/OcXJHZ9+PCvdiDKw==",
       "dev": true,
       "requires": {
-        "path-parse": "1.0.5"
+        "path-parse": "^1.0.6"
       }
     },
     "resolve-from": {
@@ -1811,6 +1862,12 @@
         "ansi-regex": "2.1.1"
       }
     },
+    "strip-bom": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
+      "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
+      "dev": true
+    },
     "strip-eof": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
@@ -1947,9 +2004,9 @@
       "dev": true
     },
     "universalify": {
-      "version": "0.1.1",
-      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.1.tgz",
-      "integrity": "sha1-+nG63UQ3r0wUiEHjs7Fl+enlkLc="
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
+      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg=="
     },
     "uri-js": {
       "version": "4.2.2",
diff --git a/package.json b/package.json
index b6e2852..8165f8b 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "fs-extra": "^4.0.1",
+    "fs-extra": "^8.0.1",
     "minilog": "^3.1.0",
     "request": "^2.83.0",
     "xml2js": "^0.4.19",
@@ -40,7 +40,7 @@
   },
   "devDependencies": {
     "eslint": "^4.9.0",
-    "eslint-config-airbnb-base": "^11.3.2",
+    "eslint-config-airbnb-base": "^12.1.0",
     "eslint-plugin-import": "^2.8.0"
   }
 }