Bump guava from 28.0-jre to 29.0-jre in /other/java/client

Bumps [guava](https://github.com/google/guava) from 28.0-jre to 29.0-jre.
- [Release notes](https://github.com/google/guava/releases)
- [Commits](https://github.com/google/guava/commits)

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

other/java/client/pom.xml

@@ -17,7 +17,7 @@
         <protobuf.version>3.9.1</protobuf.version>
         <!-- follow https://github.com/grpc/grpc-java -->
         <grpc.version>1.23.0</grpc.version>
-        <guava.version>28.0-jre</guava.version>
+        <guava.version>29.0-jre</guava.version>
     </properties>
 
     <dependencies>