Add build and validate scripts

package.json

@@ -44,7 +44,9 @@
   "scripts": {
     "test": "mocha 'test/**/*.js' '!test.vendor.**/*'",
     "benchmark": "node benchmark/run",
-    "lint": "eslint ."
+    "lint": "eslint .",
+    "build": "gulp parser",
+    "validate": "yarn build && yarn lint && yarn test"
   },
   "devDependencies": {
     "@joepie91/eslint-config": "^1.1.0",