fix publishing plugin compatibility with shadow jar

Author: minio-trusted

build.gradle

@@ -19,7 +19,7 @@
 /***************************/
 
 plugins {
-  id "com.github.johnrengelman.shadow" version "6.0.0"
+  id "com.github.johnrengelman.shadow" version "5.2.0"
   id "com.github.spotbugs" version "4.5.0"
   id "io.codearte.nexus-staging" version "0.22.0"
   id "de.marcphilipp.nexus-publish" version "0.4.0"