Bump Microsoft.EntityFrameworkCore.Sqlite from 3.1.3 to 3.1.7

Bumps [Microsoft.EntityFrameworkCore.Sqlite](https://github.com/dotnet/efcore) from 3.1.3 to 3.1.7.
- [Release notes](https://github.com/dotnet/efcore/releases)
- [Commits](dotnet/efcore@v3.1.3...v3.1.7)

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

Rnwood.Smtp4dev/Rnwood.Smtp4dev.csproj

@@ -25,7 +25,7 @@
 		<PackageReference Include="Microsoft.AspNetCore.SignalR.Core" Version="1.1.0" />
 		<PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="2.2.0" />
 		<PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="3.1.7" />
-		<PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="3.1.3" />
+		<PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="3.1.7" />
 		<PackageReference Include="MimeKit" Version="2.6.0" />
 		<PackageReference Include="Rnwood.SmtpServer" Version="3.1.0-ci0579" />
 		<PackageReference Include="Portable.BouncyCastle" Version="1.8.6.7" />