Bump io.keen:keen-client-api-java from 5.6.0 to 6.0.0

Bumps [io.keen:keen-client-api-java](https://github.com/keenlabs/KeenClient-java) from 5.6.0 to 6.0.0.
- [Commits](https://github.com/keenlabs/KeenClient-java/commits)

---
updated-dependencies:
- dependency-name: io.keen:keen-client-api-java
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

pom.xml

@@ -420,7 +420,7 @@
         <dependency>
             <groupId>io.keen</groupId>
             <artifactId>keen-client-api-java</artifactId>
-            <version>5.6.0</version>
+            <version>6.0.0</version>
             <exclusions>
                 <!-- upper bound fix, git plugin pulls in later versions -->
                 <exclusion>