chore(package): update simple-peer to version 6.0.0

http://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -34,7 +34,7 @@
     "run-parallel": "^1.1.2",
     "run-series": "^1.0.2",
     "simple-get": "^2.0.0",
-    "simple-peer": "^5.0.0",
+    "simple-peer": "^6.0.0",
     "simple-websocket": "^3.0.0",
     "string2compact": "^1.1.1",
     "uniq": "^1.0.1",