housekeeping: Use .NET 5.0.301 (#58)

* housekeeping: Use .NET 5.0.301

* build(deps): Bump Microsoft.CodeAnalysis.CSharp in /src

Bumps [Microsoft.CodeAnalysis.CSharp](https://github.com/dotnet/roslyn) from 3.9.0 to 3.10.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/main/docs/Breaking%20API%20Changes.md)
- [Commits](dotnet/roslyn@v3.9.0...v3.10.0)

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

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

* Resolve conflicts

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

.github/workflows/ci-build.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Install .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.200
+        dotnet-version: 5.0.301
 
     - name: NBGV
       id: nbgv

src/Avalonia.NameGenerator.Tests/Avalonia.NameGenerator.Tests.csproj

@@ -7,8 +7,8 @@
         <InstallAvalonia>true</InstallAvalonia>
     </PropertyGroup>
     <ItemGroup>
-        <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="3.9.0" />
-        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.9.0" />
+        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.10.0" />
+        <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="3.10.0" />
         <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.2" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
         <PackageReference Include="xunit" Version="2.4.1" />

src/Avalonia.NameGenerator/Avalonia.NameGenerator.csproj

@@ -8,7 +8,7 @@
         <NoPackageAnalysis>true</NoPackageAnalysis>
     </PropertyGroup>
     <ItemGroup>
-        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.9.0" PrivateAssets="all" />
+        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.10.0" PrivateAssets="all" />
         <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.2" PrivateAssets="all" />
     </ItemGroup>
     <ItemGroup>