Merge pull request #306 from Kronos-Integration/greenkeeper/rollup-0.53.1

chore(package): update rollup to version 0.53.1

Author: arlac77

package.json

@@ -36,7 +36,7 @@
     "ava": "^0.24.0",
     "markdown-doctest": "^0.9.1",
     "nyc": "^11.4.1",
-    "rollup": "^0.53.0",
+    "rollup": "^0.53.1",
     "rollup-plugin-multi-entry": "^2.0.2",
     "semantic-release": "^11.1.0",
     "xo": "^0.19.0",