fix: upgrade @microsoft/signalr from 3.1.0 to 3.1.13 (#326)

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/38b1ffd6-0f49-4f56-b34f-c800f1e8b2aa?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -73,7 +73,7 @@
     "@angular/platform-browser": "9.1.12",
     "@angular/platform-browser-dynamic": "9.1.12",
     "@angular/router": "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",
     "big-integer": "1.6.48",