chore(package): update rollup to version 0.53.0 (#27)

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
     "eslint": "^4.0.0",
     "eslint-config-xo": "0.19.0",
     "jest-cli": "21.2.1",
-    "rollup": "^0.52.0",
+    "rollup": "^0.53.0",
     "rollup-plugin-babel": "^3.0.2",
     "rollup-plugin-commonjs": "8.2.6",
     "rollup-plugin-node-resolve": "3.0.0",