Run lint tests with regular test suite

See markedjs#1083

Author: Josh Bruce

package.json

@@ -37,7 +37,7 @@
     "uglify-js": "^3.3.10"
   },
   "scripts": {
-    "test": "node test",
+    "test": "node test && npm run test:lint",
     "test:lint": "eslint lib/marked.js test/index.js",
     "bench": "node test --bench",
     "lint": "eslint --fix lib/marked.js test/index.js",