Add ESLint and formats all code.

Author: DevanB

basic/.eslintrc

@@ -0,0 +1,13 @@
+{
+  "parser": "babel-eslint",
+    "extends": "airbnb",
+    "plugins": ["react", "react-native", "jsx-a11y", "import"],
+    "rules": {
+      "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"]}]
+    },
+    {
+      "env": {
+        "jest": true
+      }
+    }
+}

basic/App.js

@@ -1,21 +1,21 @@
-import React from 'react';
-import { ApolloProvider } from 'react-apollo';
-import { ApolloClient, HttpLink, InMemoryCache } from 'apollo-client-preset';
-import ListPage from './components/ListPage';
+import React from 'react'
+import { ApolloProvider } from 'react-apollo'
+import { ApolloClient, HttpLink, InMemoryCache } from 'apollo-client-preset'
+import ListPage from './components/ListPage'
 
-const httpLink = new HttpLink({ uri: 'http://localhost:4000' });
+const httpLink = new HttpLink({ uri: 'http://localhost:4000' })
 
 const client = new ApolloClient({
   link: httpLink,
-  cache: new InMemoryCache()
-});
+  cache: new InMemoryCache(),
+})
 
 export default class App extends React.Component {
   render() {
     return (
       <ApolloProvider client={client}>
         <ListPage />
       </ApolloProvider>
-    );
+    )
   }
 }

basic/package.json

@@ -3,6 +3,13 @@
   "version": "0.1.0",
   "private": true,
   "devDependencies": {
+    "eslint": "^4.18.0",
+    "eslint-config-airbnb": "^16.1.0",
+    "eslint-config-airbnb-base": "^12.1.0",
+    "eslint-plugin-import": "^2.8.0",
+    "eslint-plugin-jsx-a11y": "^6.0.3",
+    "eslint-plugin-react": "^7.6.1",
+    "eslint-plugin-react-native": "^3.2.1",
     "jest-expo": "25.1.0",
     "react-native-scripts": "1.8.1",
     "react-test-renderer": "16.0.0"