update Microsoft.CodeAnalysis.CSharp

Author: BarionLP

analyzer/Ametrin.Optional.Analyzer.csproj

@@ -25,7 +25,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.14.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.0.0" PrivateAssets="all" />
   </ItemGroup>
 
   <ItemGroup>

generator/Ametrin.Optional.Generator.csproj

@@ -14,7 +14,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.14.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="5.0.0" />
   </ItemGroup>
 
 </Project>