chore(deps): update dependency org.apache.maven.plugins:maven-source-plugin to v3 (#14)

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 a40c2ee..eb5acdf 100644
--- a/jgvariant-parent/pom.xml
+++ b/jgvariant-parent/pom.xml
@@ -62,7 +62,7 @@
     <maven-scm-plugin.version>2.0.0-M3</maven-scm-plugin.version>
     <maven-gpg-plugin.version>1.5</maven-gpg-plugin.version>
     <maven-javadoc-plugin.version>3.2.0</maven-javadoc-plugin.version>
-    <maven-source-plugin.version>2.2.1</maven-source-plugin.version>
+    <maven-source-plugin.version>3.2.1</maven-source-plugin.version>
     <nexus-staging-plugin.version>1.6.8</nexus-staging-plugin.version>
     <spotless-plugin.version>2.22.1</spotless-plugin.version>
     <surefire-plugin.version>3.0.0-M5</surefire-plugin.version>