fix(package): update browserify to version 16.2.1

Closes #81

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
   "license": "MIT",
   "dependencies": {
     "asset-pipe-common": "^1.0.0-beta.6",
-    "browserify": "^15.1.0",
+    "browserify": "^16.2.1",
     "readable-stream": "^2.3.3"
   },
   "devDependencies": {