Adjust eslint configuration

web3.js/.eslintrc.js

@@ -0,0 +1,61 @@
+module.exports = { // eslint-disable-line import/no-commonjs
+  'env': {
+    'browser': true,
+    'es6': true,
+    'node': true,
+  },
+  'extends': [
+    'eslint:recommended',
+    'plugin:import/errors',
+    'plugin:import/warnings',
+  ],
+  'parser': 'babel-eslint',
+  'parserOptions': {
+    'sourceType': 'module',
+    'ecmaVersion': 8,
+  },
+  'rules': {
+    'no-trailing-spaces': [
+      'error',
+    ],
+    'import/first': [
+      'error',
+    ],
+    'import/no-commonjs': [
+      'error',
+    ],
+    'import/order': [
+      'error',
+      {
+        'groups': [
+          ['internal', 'external', 'builtin'],
+          ['index', 'sibling', 'parent']
+        ],
+        'newlines-between': 'always',
+      },
+    ],
+    'indent': [
+      'error',
+      2,
+      {'MemberExpression': 0},
+    ],
+    'linebreak-style': [
+      'error',
+      'unix',
+    ],
+    'no-console': [
+      0
+    ],
+    'quotes': [
+      'error',
+      'single', {'avoidEscape': true, 'allowTemplateLiterals': true},
+    ],
+    'require-await': [
+      'error'
+    ],
+    'semi': [
+      'error',
+      'always',
+    ],
+  },
+};