fix: upgrade @microsoft/signalr from 3.1.0 to 3.1.13 (#823)

Snyk has created this PR to upgrade @microsoft/signalr from 3.1.0 to 3.1.13.

See this package in npm:
https://www.npmjs.com/package/@microsoft/signalr

See this project in Snyk:
https://app.snyk.io/org/kspearrin/project/257fd10d-8b4a-4ead-b08e-11ddee875925?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -301,7 +301,7 @@
     "@angular/platform-browser-dynamic": "9.1.12",
     "@angular/router": "9.1.12",
     "@angular/upgrade": "9.1.12",
-    "@microsoft/signalr": "3.1.0",
+    "@microsoft/signalr": "3.1.13",
     "@microsoft/signalr-protocol-msgpack": "3.1.0",
     "@nodert-win10-rs4/windows.security.credentials.ui": "^0.4.4",
     "angular2-toaster": "8.0.0",