Set up initial lint configuration

Author: alexs-mparticle

.eslintrc

@@ -0,0 +1,44 @@
+module.exports = {
+    env: {
+        browser: true,
+        node: true,
+    },
+    ignorePatterns: ['node_modules', 'dist', 'ScriptSnapshot'],
+    parser: '@babel/eslint-parser',
+    parserOptions: {
+        ecmaVersion: 6,
+        sourceType: 'module',
+        ecmaFeatures: {
+            modules: true,
+        },
+    },
+    globals: {
+        mParticle: true,
+        describe: true,
+        assert: true,
+        Should: true,
+        MockHttpServer: true,
+        it: true,
+        sinon: true,
+        const: true,
+        before: true,
+        beforeEach: true,
+        afterEach: true,
+        after: true,
+        Promise: true,
+    },
+    extends: [
+        // Recommended rules
+        'eslint:recommended',
+
+        // Turn off conflicting rules
+        'prettier',
+    ],
+    rules: {
+        'prettier/prettier': 'error',
+        'no-prototype-builtins': 'off',
+        'no-empty': 'warn',
+        'no-unused-vars': 'warn',
+        'no-useless-escape': 'off',
+    },
+};

.eslintrc.js

@@ -1,5 +1,6 @@
 {
+    "semi": true,
     "singleQuote": true,
-    "trailingComma": "es5",
-    "tabWidth": 4
+    "trailingComma": "all",
+    "tabWidth": 4,
 }