Upgrade dependencies

package.json

@@ -14,16 +14,18 @@
   },
   "lint-staged": {
     "*.js": [
-      "eslint",
       "prettier --write",
+      "eslint",
       "git add"
     ]
   },
   "eslintConfig": {
     "parserOptions": {
-      "ecmaVersion": 6,
       "sourceType": "module"
     },
+    "env": {
+      "es6": true
+    },
     "extends": "eslint:recommended"
   },
   "babel": {
@@ -55,16 +57,16 @@
   },
   "homepage": "https://github.com/css-modules/icss-utils#readme",
   "dependencies": {
-    "postcss": "^6.0.1"
+    "postcss": "^6.0.2"
   },
   "devDependencies": {
     "babel-cli": "^6.24.1",
     "babel-jest": "^20.0.3",
-    "babel-preset-env": "^1.5.1",
-    "eslint": "^3.19.0",
-    "husky": "^0.13.3",
-    "jest": "^20.0.3",
-    "lint-staged": "^3.4.2",
-    "prettier": "^1.3.1"
+    "babel-preset-env": "^1.5.2",
+    "eslint": "^4.0.0",
+    "husky": "^0.13.4",
+    "jest": "^20.0.4",
+    "lint-staged": "^3.6.1",
+    "prettier": "^1.4.4"
   }
 }