Bump Testcontainers.MariaDb and Testcontainers (#29)

Bumps [Testcontainers.MariaDb](https://github.com/testcontainers/testcontainers-dotnet) and [Testcontainers](https://github.com/testcontainers/testcontainers-dotnet). These dependencies needed to be updated together.

Updates `Testcontainers.MariaDb` from 3.6.0 to 3.7.0
- [Release notes](https://github.com/testcontainers/testcontainers-dotnet/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-dotnet/blob/develop/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-dotnet@3.6.0...3.7.0)

Updates `Testcontainers` from 3.6.0 to 3.7.0
- [Release notes](https://github.com/testcontainers/testcontainers-dotnet/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-dotnet/blob/develop/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-dotnet@3.6.0...3.7.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Patrick Moreau <patrick@drifterapps.com>

src/Testing/Testing.csproj

@@ -22,7 +22,7 @@
         <PackageReference Include="Respawn" Version="6.2.0"/>
         <PackageReference Include="System.Linq.Async" Version="6.0.1"/>
         <PackageReference Include="Testcontainers" Version="3.7.0" />
-        <PackageReference Include="Testcontainers.MariaDb" Version="3.6.0" />
+        <PackageReference Include="Testcontainers.MariaDb" Version="3.7.0" />
         <PackageReference Include="xunit.categories" Version="2.0.8" />
     </ItemGroup>