chore(package): update browserify to version 16.2.0

Closes #17

Author: greenkeeper[bot]

package.json

@@ -11,7 +11,7 @@
   },
   "homepage": "https://github.com/audiojs/audio-context",
   "devDependencies": {
-    "browserify": "^15.1.0",
+    "browserify": "^16.2.0",
     "is-browser": "^2.0.1",
     "tape": "*",
     "tape-run": "^3.0.0"