Add ESLint support

Author: dkundel

.eslintrc.json

@@ -0,0 +1,39 @@
+{
+    "env": {
+        "browser": true,
+        "commonjs": true,
+        "es6": true,
+        "node": true
+    },
+    "extends": [
+        "eslint:recommended",
+        "google",
+        "prettier"
+    ],
+    "plugins": [
+        "prettier"
+    ],
+    "rules": {
+        "prettier/prettier": ["error", {
+            "singleQuote": true,
+            "trailingComma": "es5"
+        }],
+        "no-console": 0,
+        "indent": [
+            "error",
+            2
+        ],
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "quotes": [
+            "error",
+            "single"
+        ],
+        "semi": [
+            "error",
+            "always"
+        ]
+    }
+}