Bump version to 4.2.0

Author: DamonOehlman

Diff for: package.json

@@ -2,7 +2,7 @@
   "name": "rtc-tools",
   "description": "Cross-browser WebRTC helpers",
   "author": "Damon Oehlman <[email protected]>",
-  "version": "4.1.6",
+  "version": "4.2.0",
   "dependencies": {
     "cog": "^1.0.0",
     "mbus": "^1.2.0",
@@ -47,4 +47,4 @@
     "files": "test/all.js",
     "server": "test/server.js"
   }
-}
+}