chore(deps): update dependency org.apache.maven.plugins:maven-gpg-plugin to v3 (#13)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
diff --git a/jgvariant-parent/pom.xml b/jgvariant-parent/pom.xml
index eb5acdf..ecb83a9 100644
--- a/jgvariant-parent/pom.xml
+++ b/jgvariant-parent/pom.xml
@@ -60,7 +60,7 @@
     <flatten-plugin.version>1.2.7</flatten-plugin.version>
     <jar-plugin.version>3.2.2</jar-plugin.version>
     <maven-scm-plugin.version>2.0.0-M3</maven-scm-plugin.version>
-    <maven-gpg-plugin.version>1.5</maven-gpg-plugin.version>
+    <maven-gpg-plugin.version>3.0.1</maven-gpg-plugin.version>
     <maven-javadoc-plugin.version>3.2.0</maven-javadoc-plugin.version>
     <maven-source-plugin.version>3.2.1</maven-source-plugin.version>
     <nexus-staging-plugin.version>1.6.8</nexus-staging-plugin.version>