build: bump dgeni-packages from 0.27.1 to 0.28.4 (#20800)

Bumps [dgeni-packages](https://github.com/angular/dgeni-packages) from 0.27.1 to 0.28.4.
- [Release notes](https://github.com/angular/dgeni-packages/releases)
- [Changelog](https://github.com/angular/dgeni-packages/blob/master/CHANGELOG.md)
- [Commits](angular/dgeni-packages@v0.27.1...v0.28.4)

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

package.json

@@ -117,7 +117,7 @@
     "codelyzer": "^6.0.0-next.1",
     "conventional-changelog": "^3.0.5",
     "dgeni": "^0.4.11",
-    "dgeni-packages": "^0.27.1",
+    "dgeni-packages": "^0.28.4",
     "firebase-tools": "^7.5.0",
     "fs-extra": "^3.0.1",
     "glob": "^7.1.2",