chore(deps): update dependency rollup to v0.60.4 (#81)

Author: renovate[bot]

package.json

@@ -52,7 +52,7 @@
     "prettier": "1.13.5",
     "prettier-package-json": "1.6.0",
     "rimraf": "2.6.2",
-    "rollup": "0.60.3",
+    "rollup": "0.60.4",
     "rollup-plugin-babel": "4.0.0-beta.5",
     "rollup-plugin-commonjs": "9.1.3",
     "rollup-plugin-node-resolve": "3.3.0",

yarn.lock

@@ -3929,9 +3929,9 @@ rollup-pluginutils@^2.0.1:
     estree-walker "^0.3.0"
     micromatch "^2.3.11"
 
-rollup@0.60.3:
-  version "0.60.3"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-0.60.3.tgz#2fe5a484e4a564f188b865129a32087bc15c3d69"
+rollup@0.60.4:
+  version "0.60.4"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-0.60.4.tgz#facbe8f675f679b005e6ca2911e772aacc0fecd1"
   dependencies:
     "@types/estree" "0.0.39"
     "@types/node" "*"