Downgrades package reference to fix build error

Author: matzefriedrich

src/System.CommandLine.Extensions.SourceGenerators/System.CommandLine.Extensions.SourceGenerators.csproj

@@ -3,8 +3,8 @@
     <PropertyGroup>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
-        <LangVersion>latest</LangVersion>
-        <TargetFrameworks>netstandard2.0</TargetFrameworks>
+        <LangVersion>default</LangVersion>
+        <TargetFramework>netstandard2.0</TargetFramework>
         <EnforceExtendedAnalyzerRules>true</EnforceExtendedAnalyzerRules>
     </PropertyGroup>
 
@@ -13,7 +13,7 @@
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.9.2" />
+        <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />
     </ItemGroup>
 
 </Project>

src/System.CommandLine.Extensions/System.CommandLine.Extensions.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <PackageVersion>2.1.1-beta4.22272.1</PackageVersion>
+        <PackageVersion>2.1.2-beta4.22272.1</PackageVersion>
         <Authors>Matthias Friedrich</Authors>
         <Description>A slim command configuration and execution layer similar to Microsoft.Extensions.CommandlineUtils.</Description>
         <Copyright>2020 - 2024 by Matthias Friedrich</Copyright>
@@ -11,9 +11,9 @@
         <LangVersion>default</LangVersion>
         <Nullable>enable</Nullable>
         <PackageReadmeFile>README.md</PackageReadmeFile>
-        <AssemblyVersion>2.1.1.0</AssemblyVersion>
-        <FileVersion>2.1.1.0</FileVersion>
-        <TargetFrameworks>net8.0</TargetFrameworks>
+        <AssemblyVersion>2.1.2.0</AssemblyVersion>
+        <FileVersion>2.1.2.0</FileVersion>
+        <TargetFramework>net8.0</TargetFramework>
     </PropertyGroup>
 
     <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">