fix: Re-added netcoreapp3.1

Author: thygesteffensen

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
     name: Testing
     strategy:
       matrix:
-        dotnet: [ 'net6.0', 'net7.0' ]
+        dotnet: [ 'netcoreapp3.1', 'net6.0', 'net7.0' ]
     steps:
       - name: Checkout code base
         uses: actions/checkout@v2
@@ -30,7 +30,7 @@ jobs:
     name: Building
     strategy:
       matrix:
-        dotnet: [ 'net6.0', 'net7.0' ]
+        dotnet: [ 'netcoreapp3.1', 'net6.0', 'net7.0' ]
     steps:
       - name: Checkout code base
         uses: actions/checkout@v2

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
     name: Testing
     strategy:
       matrix:
-        dotnet: [ 'net6.0', 'net7.0' ]
+        dotnet: [ 'netcoreapp3.1', 'net6.0', 'net7.0' ]
     steps:
       - name: Checkout code base
         uses: actions/checkout@v2

ExpressionEngine/ExpressionEngine.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>net6.0;net7.0</TargetFrameworks>
+        <TargetFrameworks>netcoreapp3.1;net6.0;net7.0</TargetFrameworks>
 
         <PackageId>Delegate.ExpressionEngine</PackageId>
         <Authors>Delegate A/S,thygesteffensen</Authors>
@@ -11,6 +11,12 @@
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
     </PropertyGroup>
 
+    <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+        <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="3.1.31" />
+        <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+        <PackageReference Include="Sprache" Version="2.3.1" />
+    </ItemGroup>
+    
     <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
         <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="6.0.0" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />

ExpressionEngine/ExpressionGrammar.cs

@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
-using ExpressionEngine.Functions.Base;
 using ExpressionEngine.Rules;
 using Sprache;
 

Test/Test.csproj

@@ -1,11 +1,22 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>net6.0;net7.0</TargetFrameworks>
+        <TargetFrameworks>netcoreapp3.1;net6.0;net7.0</TargetFrameworks>
 
         <IsPackable>false</IsPackable>
     </PropertyGroup>
 
+    <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
+        <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.1.31" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.5.0" />
+        <PackageReference Include="NUnit" Version="3.9.0" />
+        <PackageReference Include="NUnit3TestAdapter" Version="3.9.0" />
+        <PackageReference Include="coverlet.collector" Version="3.2.0">
+            <PrivateAssets>all</PrivateAssets>
+            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
+    </ItemGroup>
+
     <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
         <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.1" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.4.0" />