Bump typedoc from 0.20.36 to 0.21.2

Bumps [typedoc](https://github.com/TypeStrong/TypeDoc) from 0.20.36 to 0.21.2.
- [Release notes](https://github.com/TypeStrong/TypeDoc/releases)
- [Commits](https://github.com/TypeStrong/TypeDoc/compare/v0.20.36...v0.21.2)

---
updated-dependencies:
- dependency-name: typedoc
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -50,7 +50,7 @@
     "style-loader": "^3.0.0",
     "svg-inline-loader": "^0.8.2",
     "tslib": "^2.3.0",
-    "typedoc": "^0.20.36",
+    "typedoc": "^0.21.2",
     "typescript": "^4.2.4",
     "url-loader": "^4.1.1",
     "val-loader": "4.0.0",