ios: update react-native-werbtc in order to fix leaking streams

package-lock.json

       }
     },
     "react-native-webrtc": {
-      "version": "github:jitsi/react-native-webrtc#032ee5c90e2c5ff27ab2f952217104772fcbd155",
-      "from": "github:jitsi/react-native-webrtc#032ee5c90e2c5ff27ab2f952217104772fcbd155",
+      "version": "github:jitsi/react-native-webrtc#659d2fe417b52356b1b706636de97e23bae3e9f5",
+      "from": "github:jitsi/react-native-webrtc#659d2fe417b52356b1b706636de97e23bae3e9f5",
       "requires": {
         "base64-js": "^1.1.2",
         "event-target-shim": "^1.0.5",

package.json

     "react-native-sound": "0.10.12",
     "react-native-swipeout": "2.3.6",
     "react-native-vector-icons": "6.0.2",
-    "react-native-webrtc": "github:jitsi/react-native-webrtc#032ee5c90e2c5ff27ab2f952217104772fcbd155",
+    "react-native-webrtc": "github:jitsi/react-native-webrtc#659d2fe417b52356b1b706636de97e23bae3e9f5",
     "react-redux": "5.0.7",
     "react-transition-group": "2.4.0",
     "redux": "4.0.0",