Bump maven-gpg-plugin from 1.4 to 3.1.0#259

xerial merged 2 commits intomastertreasure-data/td-client-java:masterfrom

dependabot/maven/org.apache.maven.plugins-maven-gpg-plugin-3.1.0treasure-data/td-client-java:dependabot/maven/org.apache.maven.plugins-maven-gpg-plugin-3.1.0Copy head branch name to clipboard