Merge pull request #325 from twbs/bump-banner

Bump grunt-banner to ^0.6.0

package.json

@@ -36,7 +36,7 @@
   "devDependencies": {
     "coveralls": "^2.11.2",
     "grunt": "^0.4.5",
-    "grunt-banner": "^0.3.1",
+    "grunt-banner": "^0.6.0",
     "grunt-browserify": "^3.2.0",
     "grunt-contrib-clean": "^0.7.0",
     "grunt-contrib-jshint": "^0.11.0",