build(deps-dev): bump typescript from 3.9.7 to 3.9.9 in /html (#605)

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.9.7 to 3.9.9.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/compare/v3.9.7...v3.9.9)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

html/package.json

@@ -55,7 +55,7 @@
     "ts-loader": "^8.0.17",
     "tslint": "^6.1.3",
     "tslint-loader": "^3.5.4",
-    "typescript": "^3.9.7",
+    "typescript": "^3.9.9",
     "webpack": "4.46.0",
     "webpack-cli": "^4.5.0",
     "webpack-dev-server": "^3.11.2",