add net462, netstandard2.0 and net8.0 target frameworks

Author: phnx47

src/Prometheus.Client.MetricPusher.HostedService.csproj

@@ -1,13 +1,23 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFrameworks>net462;netstandard2.0;net6.0;net8.0</TargetFrameworks>
     <Description>MetricPusher as HostedService</Description>
     <RepositoryUrl>https://github.com/prom-client-net/prom-client-metricpusher-hostedservice</RepositoryUrl>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Prometheus.Client.MetricPusher" Version="3.2.0" />
+  </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == 'net462' OR '$(TargetFramework)' == 'netstandard2.0'">
+    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="3.1.32 " />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="3.1.32" />
+  </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
     <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="6.0.1" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="6.0.0" />
   </ItemGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
+    <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="8.0.1" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="8.0.2" />
+  </ItemGroup>
 </Project>

tests/Prometheus.Client.MetricPusher.HostedService.Tests.csproj

@@ -1,14 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
-    <InvariantGlobalization>true</InvariantGlobalization>
+    <TargetFrameworks Condition="'$(OS)' == 'Unix'">net6.0;net8.0</TargetFrameworks>
+    <TargetFrameworks Condition="'$(OS)' != 'Unix'">net462;net6.0;net8.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="FluentAssertions" Version="7.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="NSubstitute" Version="5.3.0" />
-    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.2" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.1" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <PrivateAssets>all</PrivateAssets>