Move back to latest EF 2.1 version

Author: TylerCarlson1

src/AutoMapper.Collection.EntityFrameworkCore.Tests/AutoMapper.Collection.EntityFrameworkCore.Tests.csproj

@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' != 'netcoreapp3.0' ">
-    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="3.1.10" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="2.1.14" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp3.0' ">

src/AutoMapper.Collection.EntityFrameworkCore/AutoMapper.Collection.EntityFrameworkCore.csproj

@@ -24,7 +24,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.10" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.1.14" />
     <PackageReference Include="Roslynator.Analyzers" Version="2.3.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>