chore(package): update eslint to version 6.3.0

Closes #11

Author: greenkeeper[bot]

package.json

@@ -48,7 +48,7 @@
     "babel-preset-env": "^1.6.1",
     "babel-preset-stage-2": "^6.24.1",
     "del-cli": "^1.1.0",
-    "eslint": "^4.4.1",
+    "eslint": "^6.3.0",
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-config-prettier": "^2.3.0",
     "eslint-plugin-import": "^2.7.0",