chore(deps-dev): bump typescript from 3.9.8 to 3.9.9

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.9.8 to 3.9.9.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v3.9.8...v3.9.9)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -92,7 +92,7 @@
     "to-string-loader": "1.1.6",
     "tslint": "5.20.1",
     "tslint-config-standard": "9.0.0",
-    "typescript": "3.9.8",
+    "typescript": "3.9.9",
     "webpack": "^5.21.2",
     "webpack-dev-server": "3.11.2",
     "webpack-merge": "5.7.3"