Bump gson from 1.7.1 to 2.8.9 in /server/Peach/rdfutils#9

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dependabot/maven/server/Peach/rdfutils/com.google.code.gson-gson-2.8.9i3mainz/LabelingSystemDraft2015:dependabot/maven/server/Peach/rdfutils/com.google.code.gson-gson-2.8.9Copy head branch name to clipboard