fix(package): update simple-peer to version 9.0.0

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "run-series": "^1.0.2",
     "safe-buffer": "^5.0.0",
     "simple-get": "^2.0.0",
-    "simple-peer": "^8.3.0",
+    "simple-peer": "^9.0.0",
     "simple-websocket": "^7.0.1",
     "string2compact": "^1.1.1",
     "uniq": "^1.0.1",