Bump typescript from 4.1.2 to 4.2.3 in /Rnwood.Smtp4dev/ClientApp

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 4.1.2 to 4.2.3.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Rnwood.Smtp4dev/ClientApp/package.json

@@ -32,7 +32,7 @@
     "moment": "^2.29.1",
     "srcdoc-polyfill": "^1.0.0",
     "ts-debounce": "^2.1.0",
-    "typescript": "~4.1.2",
+    "typescript": "~4.2.3",
     "vue-router": "^3.4.9",
     "vue-template-compiler": "^2.6.12",
     "vue2-ace-editor": "0.0.15",