Bump Microsoft.EntityFrameworkCore.Tools from 2.2.4 to 2.2.6

Bumps [Microsoft.EntityFrameworkCore.Tools](https://github.com/aspnet/EntityFrameworkCore) from 2.2.4 to 2.2.6.
- [Release notes](https://github.com/aspnet/EntityFrameworkCore/releases)
- [Commits](dotnet/efcore@v2.2.4...v2.2.6)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

src/Unosquare.Tubular.AspNetCoreSample/Unosquare.Tubular.AspNetCoreSample.csproj

@@ -28,7 +28,7 @@
     <PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="2.2.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.2.4" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.2.4" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.2.4">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.2.6">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>