use json format for eslint config

Author: smhg

.eslintrc.js

@@ -0,0 +1,20 @@
+{
+  "env": {
+    "commonjs": true,
+    "es6": true,
+    "node": true
+  },
+  "extends": [
+    "standard"
+  ],
+  "globals": {
+    "Atomics": "readonly",
+    "SharedArrayBuffer": "readonly"
+  },
+  "parserOptions": {
+    "ecmaVersion": 2018
+  },
+  "rules": {
+    "semi": ["error", "always"]
+  }
+}