Update linter and test deps

Author: staylor

.eslintignore

@@ -0,0 +1,6 @@
+/lib
+/es
+/coverage
+/node_modules
+package.json
+package-lock.json

.eslintrc.json

@@ -1,5 +1,25 @@
 {
-  "extends": [
-    "eslint-config-kyt"
+  "extends": ["airbnb", "plugin:prettier/recommended", "prettier", "prettier/react"],
+
+  "rules": {
+    "import/no-extraneous-dependencies": ["warn", { "packageDir": "./" }],
+    "react/destructuring-assignment": "off",
+    "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }],
+    "prettier/prettier": "error"
+  },
+
+  "parser": "babel-eslint",
+
+  "env": {
+    "browser": true
+  },
+
+  "overrides": [
+    {
+      "files": ["jest.setup.js", "**/__tests__/**"],
+      "env": {
+        "jest": true
+      }
+    }
   ]
 }

.prettierignore

@@ -0,0 +1,6 @@
+/lib
+/es
+/coverage
+/node_modules
+package.json
+package-lock.json

.prettierrc

@@ -0,0 +1,6 @@
+{
+  "singleQuote": true,
+  "trailingComma": "es5",
+  "arrowParens": "avoid",
+  "printWidth": 100
+}

__tests__/deferred.js

@@ -1,7 +1,6 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
 import Helmet from '../src';
-import { requestAnimationFrame } from '../src/utils';
 
 /* eslint-disable no-underscore-dangle */
 

__tests__/server/meta.test.js

@@ -126,7 +126,7 @@ describe('server', () => {
           <meta charSet="utf-8" />
           <meta
             name="description"
-            content="Test description &amp; encoding of special characters like &#x27; &quot; &gt; &lt; `"
+            content='Test description &amp; encoding of special characters like &#x27; " &gt; &lt; `'
           />
           <meta httpEquiv="content-type" content="text/html" />
           <meta property="og:type" content="article" />