build(mastarm): Only lint the lib/ dir

Author: David Emory

Diff for: package.json

@@ -3,8 +3,9 @@
   "description": "A library for writing modern OpenTripPlanner-compatible multimodal journey planning web applications using React and Redux",
   "main": "build/index.js",
   "scripts": {
+    "lint": "mastarm lint \"lib/**/*.js\"",
     "prepublish": "mastarm prepublish --config configurations/prepublish",
-    "test": "mastarm lint && mastarm test",
+    "test": "yarn run lint && mastarm test",
     "start": "mastarm build --serve example.js",
     "semantic-release": "semantic-release pre && npm publish && semantic-release post"
   },