Bump Microsoft.CodeAnalysis.CSharp from 5.0.0 to 5.3.0

---
updated-dependencies:
- dependency-name: Microsoft.CodeAnalysis.CSharp
  dependency-version: 5.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

src/Riok.Mapperly/Riok.Mapperly.Roslyn5.0.props

@@ -1,5 +1,5 @@
 <Project>
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.0.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.3.0" PrivateAssets="all" />
   </ItemGroup>
 </Project>