Bump com.squareup.retrofit2:retrofit from 2.9.0 to 2.10.0

Bumps [com.squareup.retrofit2:retrofit](https://github.com/square/retrofit) from 2.9.0 to 2.10.0.
- [Release notes](https://github.com/square/retrofit/releases)
- [Changelog](https://github.com/square/retrofit/blob/trunk/CHANGELOG.md)
- [Commits](square/retrofit@2.9.0...2.10.0)

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

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

Author: dependabot[bot]

tests/test-client-generation/pom.xml

@@ -44,7 +44,7 @@
     <dependency>
       <groupId>com.squareup.retrofit2</groupId>
       <artifactId>retrofit</artifactId>
-      <version>2.9.0</version>
+      <version>2.10.0</version>
     </dependency>
 
     <dependency>