chore(package): update rollup-plugin-conditional to version 2.2.0

Closes #160

Author: greenkeeper[bot]

package.json

@@ -120,7 +120,7 @@
     "rollup": "0.50.0",
     "rollup-plugin-babel": "3.0.2",
     "rollup-plugin-cleanup": "2.0.0",
-    "rollup-plugin-conditional": "1.1.1",
+    "rollup-plugin-conditional": "2.2.0",
     "rollup-plugin-filesize": "1.4.2",
     "rollup-watch": "4.3.1",
     "semver": "5.4.1",