Bump retrofit from 2.5.0 to 2.9.0

Bumps [retrofit](https://github.com/square/retrofit) from 2.5.0 to 2.9.0.
- [Release notes](https://github.com/square/retrofit/releases)
- [Changelog](https://github.com/square/retrofit/blob/master/CHANGELOG.md)
- [Commits](square/retrofit@parent-2.5.0...2.9.0)

---
updated-dependencies:
- dependency-name: com.squareup.retrofit2:retrofit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

dependencies.gradle

@@ -15,7 +15,7 @@ ext {
     androidLegacy = "1.0.0"
     koin = "2.0.1"
     nav_version = '2.1.0-beta02'
-    retrofit_version = '2.5.0'
+    retrofit_version = '2.9.0'
     okhttp_version = '3.12.0'
     okhttp_version_loggin = '3.12.0'
     gson_version = '2.3.0'