Bump PolySharp from 1.14.1 to 1.15.0

Bumps [PolySharp](https://github.com/Sergio0694/PolySharp) from 1.14.1 to 1.15.0.
- [Release notes](https://github.com/Sergio0694/PolySharp/releases)
- [Commits](Sergio0694/PolySharp@1.14.1...1.15.0)

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

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

Directory.Packages.props

@@ -19,7 +19,7 @@
         <GlobalPackageReference Include="Nerdbank.GitVersioning"
                                 Version="3.6.146" />
         <GlobalPackageReference Include="PolySharp"
-                                Version="1.14.1" />
+                                Version="1.15.0" />
         <GlobalPackageReference Include="StyleCop.Analyzers"
                                 Version="1.2.0-beta.556" />
     </ItemGroup>