Bump Polyfill from 1.28.0 to 1.29.0 (#549)

Bumps [Polyfill](https://github.com/SimonCropp/Polyfill) from 1.28.0 to 1.29.0.
- [Commits](https://github.com/SimonCropp/Polyfill/commits)

---
updated-dependencies:
- dependency-name: Polyfill
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

src/Directory.Build.props

@@ -36,7 +36,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Polyfill " Version="1.28.0" PrivateAssets="All"/>
+    <PackageReference Include="Polyfill " Version="1.29.0" PrivateAssets="All"/>
   </ItemGroup>
 
 </Project>