'npm test' now executes 'grunt test'

package.json

@@ -26,7 +26,7 @@
     "node": ">=0.8.0"
   },
   "scripts": {
-    "test": "grunt amberc:test_runner && node test_runner.js && ( rm test_runner.js || del test_runner.js )"
+    "test": "grunt test"
   },
   "devDependencies": {
     "pegjs": "~0.8.0",