🎨 Switch to Shadow plugin fork

This commit fixes to a fork of the shadow plugin that fixes support
with recent Gradle releases.

See GradleUp/shadow#876

build.gradle

@@ -1,5 +1,5 @@
 plugins {
-  id 'com.github.johnrengelman.shadow' version '8.1.1' apply false
+  id 'io.github.goooler.shadow' version '8.1.8' apply false
   id 'de.undercouch.download' version '5.4.0'
   id 'io.freefair.aspectj' version '8.4' apply false
   id 'me.champeau.mrjar' version '0.1.1'

gradle/infra-module.gradle

@@ -5,7 +5,7 @@ apply plugin: "signing"
 apply plugin: 'java-library'
 
 // Currently commented out due to ZipException: archive is not a ZIP archive
-// apply plugin: 'com.github.johnrengelman.shadow'
+// apply plugin: 'io.github.goooler.shadow'
 apply from: "$rootDir/gradle/publications.gradle"
 
 jar {