Merge pull request #30 from square/eslint

Add eslint linting

.eslintrc.js

@@ -0,0 +1,18 @@
+module.exports = {
+  extends: [
+    'eslint:recommended'
+  ],
+  env: {
+    node: true
+  },
+  parserOptions: {
+    ecmaVersion: 2018,
+    sourceType: 'script',
+  },
+  overrides: [
+    {
+      files: ['tests/**/*.js'],
+      env: { mocha: true },
+    },
+  ],
+};

.github/workflows/ci.yml

@@ -26,3 +26,4 @@ jobs:
         node-version: ${{ matrix.node-version }}
     - run: yarn install --frozen-lockfile --non-interactive
     - run: yarn test
+    - run: yarn lint

package.json

@@ -11,6 +11,8 @@
   "author": "Square, Inc.",
   "license": "Apache-2.0",
   "scripts": {
+    "lint": "yarn lint:js",
+    "lint:js": "eslint .",
     "test": "mocha tests/**/*-test.js",
     "commitmsg": "commitlint -e $GIT_PARAMS"
   },
@@ -24,6 +26,7 @@
     "@commitlint/cli": "^5.2.6",
     "@commitlint/config-conventional": "^5.2.3",
     "chai": "^4.1.2",
+    "eslint": "^6.8.0",
     "husky": "^0.14.3",
     "mocha": "^4.0.1",
     "standard-version": "^4.2.0"