PLT-4239 fixes getUserMedia (#4038)

webapp/package.json

@@ -33,7 +33,7 @@
     "superagent": "2.1.0",
     "twemoji": "2.0.5",
     "velocity-animate": "1.2.3",
-    "webrtc-adapter": "1.4.0",
+    "webrtc-adapter": "2.0.3",
     "xregexp": "3.1.1"
   },
   "devDependencies": {