Use ESLint instead of JSHint

Author: fiznool

.jshintrc

@@ -0,0 +1,21 @@
+{
+  "env": {
+    "commonjs": true,
+    "es6": true,
+    "node": true,
+    "mocha": true
+  },
+  "extends": "eslint:recommended",
+  "globals": {
+    "Atomics": "readonly",
+    "SharedArrayBuffer": "readonly"
+  },
+  "parserOptions": {
+    "ecmaVersion": 2018
+  },
+  "rules": {
+    "eqeqeq": ["error", "smart"],
+    "no-var": ["error"],
+    "prefer-const": ["error"]
+  }
+}