eslint added

Author: tsmx

.eslintrc.json

@@ -0,0 +1,44 @@
+{
+    "env": {
+        "node": true,
+        "commonjs": true,
+        "es6": true,
+        "jest": true
+    },
+    "extends": "eslint:recommended",
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parserOptions": {
+        "ecmaVersion": 2018
+    },
+    "rules": {
+        "indent": [
+            "error",
+            4,
+            {
+                "SwitchCase": 1
+            }
+        ],
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "quotes": [
+            "error",
+            "single"
+        ],
+        "semi": [
+            "error",
+            "always"
+        ],
+        "no-unused-vars": [
+            2,
+            {
+                "args": "after-used",
+                "argsIgnorePattern": "^_"
+            }
+        ]
+    }
+}