Added eslint and resolved linting error in test

.eslintrc.js

@@ -0,0 +1,18 @@
+module.exports = {
+  'env': {
+    'es2021': true,
+    'node': true,
+    'mocha': true
+  },
+  'extends': [
+    'google',
+  ],
+  'parserOptions': {
+    'ecmaVersion': 12,
+    'sourceType': 'module',
+  },
+  'rules': {
+    'new-cap': 0,
+    'require-jsdoc': 0
+  }
+};