restoring liniting ion package json - removed in my local version

Author: Shaun Hare

package.json

@@ -10,7 +10,7 @@
   "scripts": {
     "clean": "rimraf build",
     "lint": "tslint -c src/tslint.json -e \"src/**/*.d.ts\" \"src/**/*.ts\"",
-    "prebuild": "npm run clean",
+    "prebuild": "npm run lint && npm run clean",
     "build": "tsc -p src/",
     "start": "node .",
     "test": "mocha --timeout 5000 -R dot --require source-map-support/register --recursive build/test",