Bump Microsoft.EntityFrameworkCore.InMemory from 6.0.15 to 7.0.18

Bumps [Microsoft.EntityFrameworkCore.InMemory](https://github.com/dotnet/efcore) from 6.0.15 to 7.0.18.
- [Release notes](https://github.com/dotnet/efcore/releases)
- [Commits](dotnet/efcore@v6.0.15...v7.0.18)

---
updated-dependencies:
- dependency-name: Microsoft.EntityFrameworkCore.InMemory
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

tests/BasicRepos.Test.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.18" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="6.0.15" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="7.0.18" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="Moq" Version="4.20.70" />
     <PackageReference Include="xunit" Version="2.7.1" />