Clean up and move to Net6 with lib on just netstandard

DateTimeExtensions.sln

@@ -21,8 +21,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{EB805547-455
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{0F8CA42F-760A-4A42-BD0F-0AC9900B6712}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = ".build", "build\.build.csproj", "{8BB0AD48-A370-405F-B295-03D7F1811375}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DateTimeExtensions", "src\DateTimeExtensions\DateTimeExtensions.csproj", "{650FA9EC-03BE-43AF-87FF-9632856E31EE}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DateTimeExtensions.Tests", "tests\DateTimeExtensions.Tests\DateTimeExtensions.Tests.csproj", "{2BB0401A-4DCA-4D59-B15D-6C895304D2AF}"
@@ -33,8 +31,6 @@ Global
 		Release|Any CPU = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{8BB0AD48-A370-405F-B295-03D7F1811375}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{8BB0AD48-A370-405F-B295-03D7F1811375}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{650FA9EC-03BE-43AF-87FF-9632856E31EE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{650FA9EC-03BE-43AF-87FF-9632856E31EE}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{650FA9EC-03BE-43AF-87FF-9632856E31EE}.Release|Any CPU.ActiveCfg = Release|Any CPU

src/DateTimeExtensions/DateTimeExtensions.csproj

@@ -3,7 +3,7 @@
     <Description>This project is a merge of several common DateTime operations on the form of extensions to System.DateTime, including natural date difference text (precise and human rounded), holidays and working days calculations on several culture locales. Feedback will be much appreciated.</Description>
     <AssemblyTitle>DateTime Extensions</AssemblyTitle>
     <Authors>Joao Matos Silva</Authors>
-    <TargetFrameworks>netstandard2.0;net461</TargetFrameworks>
+    <TargetFrameworks>netstandard2.0</TargetFrameworks>
     <AssemblyName>DateTimeExtensions</AssemblyName>
     <PackageId>DateTimeExtensions</PackageId>
     <PackageTags>Natural;Date;Time;Relative;Calendar;Holiday;Workingday;DateTime</PackageTags>
@@ -18,28 +18,7 @@
     <PackageIconUrl>https://github.com/joaomatossilva/DateTimeExtensions/raw/master/assets/datetimeextensions-60-logo.png</PackageIconUrl>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
-    <FileUpgradeFlags>40</FileUpgradeFlags>
-    <UpgradeBackupLocation>C:\Users\Alsay\Desktop\DateTimeExtensions\Backup\src\DateTimeExtensions\</UpgradeBackupLocation>
   </PropertyGroup>
-  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' ">
-    <PackageReference Include="System.Diagnostics.Debug" Version="4.3.0" />
-    <PackageReference Include="System.Linq" Version="4.3.0" />
-    <PackageReference Include="System.Reflection.Extensions" Version="4.3.0" />
-    <PackageReference Include="System.Resources.ResourceManager" Version="4.3.0" />
-    <PackageReference Include="System.Runtime.Extensions" Version="4.3.1" />
-    <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
-    <PackageReference Include="System.Globalization.Calendars" Version="4.3.0" />
-  </ItemGroup>
-  <ItemGroup Condition=" '$(TargetFramework)' == 'net45' ">
-    <Reference Include="System" />
-    <Reference Include="Microsoft.CSharp" />
-  </ItemGroup>
-  <ItemGroup>    
-    <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies.net461" Version="1.0.3">
-      <PrivateAssets>all</PrivateAssets>
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-    </PackageReference>
-  </ItemGroup>
   <ItemGroup>
     <Compile Update="WorkingDays\HolidayNames.Designer.cs">
       <DesignTime>True</DesignTime>
@@ -53,11 +32,7 @@
       <LastGenOutput>HolidayNames.Designer.cs</LastGenOutput>
     </EmbeddedResource>
   </ItemGroup>
-  <!--
   <ItemGroup>
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta-62925-02">
-      <PrivateAssets>all</PrivateAssets>
-    </PackageReference>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All"/>
   </ItemGroup>
--->
 </Project>