Bump retrofit from 2.4.0 to 2.5.0
Bump retrofit from 2.4.0 to 2.5.0

Bumps [retrofit](https://github.com/square/retrofit) from 2.4.0 to 2.5.0.
- [Release notes](https://github.com/square/retrofit/releases)
- [Changelog](https://github.com/square/retrofit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/square/retrofit/compare/parent-2.4.0...parent-2.5.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
berviantoleo/learn-android