compile net48 on Linux (#182)

Author: jetersen

.github/workflows/ci.yml

@@ -12,6 +12,13 @@ jobs:
         with:
           fetch-depth: 0
 
+      - uses: actions/cache@v2
+        with:
+          path: ~/.nuget/packages
+          key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-nuget-
+
       - name: Setup dotnet
         uses: actions/setup-dotnet@v1
         with:

src/GitLabApiClient/GitLabApiClient.csproj

@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks Condition="'$(OS)' != 'Unix'">netstandard2.0;net48;netcoreapp3.1</TargetFrameworks>
-    <TargetFrameworks Condition="'$(OS)' == 'Unix'">netstandard2.0;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0;net48;netcoreapp3.1</TargetFrameworks>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
     <Copyright />
     <Description>GitLabApiClient is a .NET rest client for GitLab API v4.</Description>
@@ -20,6 +19,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" PrivateAssets="All" Version="1.0.0" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
   </ItemGroup>