chore(package): update eslint to version 4.4.0

Closes #470

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
     "copy-webpack-plugin": "4.0.1",
     "css-loader": "0.28.3",
     "enzyme": "^2.8.2",
-    "eslint": "^3.16.1",
+    "eslint": "^4.4.0",
     "eslint-config-import": "^0.13.0",
     "eslint-config-scratch": "^3.0.0",
     "eslint-plugin-import": "^2.7.0",