Bump Microsoft.Owin.Hosting from 3.0.1 to 4.0.1 in /tests/NLog.UnitTests
Bump Microsoft.Owin.Hosting from 3.0.1 to 4.0.1 in /tests/NLog.UnitTests

Bumps [Microsoft.Owin.Hosting](https://github.com/aspnet/AspNetKatana) from 3.0.1 to 4.0.1.
- [Release notes](https://github.com/aspnet/AspNetKatana/releases)
- [Commits](https://github.com/aspnet/AspNetKatana/compare/v3.0.1...v4.0.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
NLog/NLog,BrutalCode/NLog,UgurAldanmaz/NLog,luigiberrettini/NLog,UgurAldanmaz/NLog,luigiberrettini/NLog,304NotModified/NLog,sean-gilliam/NLog,BrutalCode/NLog,snakefoot/NLog