Package Dependencies: Bump MediatR from 12.2.0 to 12.3.0 (#49)

Bumps [MediatR](https://github.com/jbogard/MediatR) from 12.2.0 to 12.3.0.
- [Release notes](https://github.com/jbogard/MediatR/releases)
- [Commits](LuckyPennySoftware/MediatR@v12.2.0...v12.3.0)

---
updated-dependencies:
- dependency-name: MediatR
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

QueryKit.IntegrationTests/QueryKit.IntegrationTests.csproj

@@ -13,7 +13,7 @@
         <PackageReference Include="Bogus" Version="35.4.0" />
         <PackageReference Include="Ductus.FluentDocker" Version="2.10.59" />
         <PackageReference Include="FluentAssertions" Version="6.12.0" />
-        <PackageReference Include="MediatR" Version="12.2.0" />
+        <PackageReference Include="MediatR" Version="12.3.0" />
         <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.1" />
         <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="8.0.1" />
         <PackageReference Include="CleanMoq" Version="1.0.0" />

QueryKit.WebApiTestProject/QueryKit.WebApiTestProject.csproj

@@ -9,7 +9,7 @@
     <ItemGroup>
         <PackageReference Include="Ardalis.SmartEnum" Version="8.0.0" />
         <PackageReference Include="EFCore.NamingConventions" Version="8.0.3" />
-        <PackageReference Include="MediatR" Version="12.2.0" />
+        <PackageReference Include="MediatR" Version="12.3.0" />
         <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.1" />
         <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.0" />
         <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.1" />