chore(deps): update dependency sinon-chai to v3.4.0

Author: renovate-bot

package-lock.json

@@ -137,7 +137,7 @@
     "nyc": "15.0.0",
     "prettier": "1.19.1",
     "sinon": "8.0.1",
-    "sinon-chai": "3.3.0",
+    "sinon-chai": "3.4.0",
     "socket.io-client": "2.3.0",
     "supertest": "4.0.2",
     "ts-node": "8.5.4",