chore(package): update rollup to version 0.59.0

Closes #40

Author: greenkeeper[bot]

package.json

@@ -74,7 +74,7 @@
     "jest": "^21.0.0",
     "jsdoc-to-markdown": "^4.0.0",
     "jest-cli": "^21.0.0",
-    "rollup": "^0.48.0",
+    "rollup": "^0.59.0",
     "rollup-plugin-babel": "^2.7.1",
     "semantic-release": "^7.0.1",
     "standard": "^10.0.0",