Update rollup to the latest version 🚀 (#165)

* chore(package): update rollup to version 0.56.0

* chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
         "platform": "^1.3.4",
         "prettier": "^1.9.2",
         "rimraf": "^2.6.2",
-        "rollup": "^0.55.0",
+        "rollup": "^0.56.0",
         "rollup-plugin-alias": "^1.4.0",
         "rollup-plugin-babel": "^4.0.0-beta.0",
         "rollup-plugin-commonjs": "^8.2.6",

yarn.lock

@@ -4134,9 +4134,9 @@ rollup-pluginutils@^2.0.1:
     estree-walker "^0.3.0"
     micromatch "^2.3.11"
 
-rollup@^0.55.0:
-  version "0.55.0"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-0.55.0.tgz#e547149333bdd91457a9e8101cf86783e21c576e"
+rollup@^0.56.0:
+  version "0.56.0"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-0.56.0.tgz#4aefe9cef84a01ac3245e3fbba155e38dc2cc2e8"
 
 rxjs@^5.4.2:
   version "5.5.2"