[tests] add editorconfig and eslint

.eslintrc.js

@@ -0,0 +1,25 @@
+module.exports = {
+  env: {
+    commonjs: true,
+    es6: true,
+    node: true
+  },
+  extends: [
+    'airbnb-base'
+  ],
+  globals: {
+    Atomics: 'readonly',
+    SharedArrayBuffer: 'readonly'
+  },
+  parserOptions: {
+    ecmaVersion: 2018,
+  },
+  rules: {
+    "comma-dangle": [
+      "error",
+      "never"
+    ],
+    "no-console": "off",
+    "object-curly-newline": "off"
+  }
+};