Looks like maven-shade-plugin required at least Maven 3.6.3

Author: tmortagne

pom.xml

@@ -6,7 +6,7 @@
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.scope>provided</maven.scope>
-    <maven.version>3.6.0</maven.version>
+    <maven.version>3.6.3</maven.version>
     <maven.plugin.version>3.10.2</maven.plugin.version>
     <plexus.sec.version>1.4</plexus.sec.version>
     <additionalparam>-Xdoclint:none</additionalparam>