Bump gson from 2.8.6 to 2.8.9 in /java-servlet-angularjs#58

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dependabot/maven/java-servlet-angularjs/com.google.code.gson-gson-2.8.9allanjos/java_samples:dependabot/maven/java-servlet-angularjs/com.google.code.gson-gson-2.8.9Copy head branch name to clipboard