build: bump tsutils from 3.20.0 to 3.21.0 (angular#22233)

Bumps [tsutils](https://github.com/ajafff/tsutils) from 3.20.0 to 3.21.0.
- [Release notes](https://github.com/ajafff/tsutils/releases)
- [Changelog](https://github.com/ajafff/tsutils/blob/master/CHANGELOG.md)
- [Commits](ajafff/tsutils@v3.20.0...v3.21.0)

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

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

Author: dependabot[bot]

yarn.lock

@@ -12989,9 +12989,9 @@ tsutils@^2.29.0:
     tslib "^1.8.1"
 
 tsutils@^3.0.0, tsutils@^3.17.1:
-  version "3.20.0"
-  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.20.0.tgz#ea03ea45462e146b53d70ce0893de453ff24f698"
-  integrity sha512-RYbuQuvkhuqVeXweWT3tJLKOEJ/UUw9GjNEZGWdrLLlM+611o1gwLHBpxoFJKKl25fLprp2eVthtKs5JOrNeXg==
+  version "3.21.0"
+  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-3.21.0.tgz#b48717d394cea6c1e096983eed58e9d61715b623"
+  integrity sha512-mHKK3iUXL+3UF6xL5k0PEhKRUBKPBCv/+RkEOpjRWxxx27KKRBmmA60A9pgOUvMi8GKhRMPEmjBRPzs2W7O1OA==
   dependencies:
     tslib "^1.8.1"