refactor(lint): Move eslintrc into package.json for simplicity

Author: Ray Schamp

.eslintrc

@@ -7,6 +7,9 @@
     "test": "eslint .",
     "semantic-release": "semantic-release pre && npm publish && semantic-release post"
   },
+  "eslintConfig": {
+    "extends": "./index.js"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/LLK/eslint-config-scratch.git"