Update dependency jest to v26.6.1

Author: renovate-bot

package-lock.json

@@ -44,7 +44,7 @@
     "@types/ws": "7.2.7",
     "chance": "1.1.7",
     "cross-env": "7.0.2",
-    "jest": "26.6.0",
+    "jest": "26.6.1",
     "nodemon": "2.0.6",
     "prettier": "2.1.2",
     "subscriptions-transport-ws": "0.9.18",