chore(package): update phantomjs-prebuilt to version 2.1.16

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
     "karma-sourcemap-loader": "0.3.7",
     "karma-webpack": "2.0.5",
     "mocha": "4.0.1",
-    "phantomjs-prebuilt": "2.1.15",
+    "phantomjs-prebuilt": "2.1.16",
     "semver": "5.4.1",
     "should": "13.1.1",
     "ts-loader": "3.1.1",