Bump gson from 2.2.4 to 2.8.9 in /javaclient#157

dependabot[bot] wants to merge 1 commit intosingle-machineucbrise/confluo:single-machinefrom

dependabot/maven/javaclient/com.google.code.gson-gson-2.8.9ucbrise/confluo:dependabot/maven/javaclient/com.google.code.gson-gson-2.8.9Copy head branch name to clipboard