chore(package): update rollup to version 0.29.0

Closes sebholstein#400

Author: greenkeeperio-bot

package.json

@@ -62,7 +62,7 @@
     "merge2": "1.0.2",
     "replace": "0.3.0",
     "require-dir": "0.3.0",
-    "rollup": "0.26.7",
+    "rollup": "0.29.0",
     "run-sequence": "1.2.1",
     "systemjs": "0.19.29",
     "tslint": "3.10.2",