chore(package): update rollup-plugin-babel-minify to version 6.0.0

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "jest": "^22.4.3",
     "rollup": "^0.64.0",
     "rollup-plugin-babel": "^4.0.0-beta.4",
-    "rollup-plugin-babel-minify": "^5.0.0",
+    "rollup-plugin-babel-minify": "^6.0.0",
     "rollup-plugin-commonjs": "^9.1.0",
     "rollup-plugin-filesize": "^2.0.0",
     "rollup-plugin-json": "^3.0.0",