I am using Gradle 6.8.2, and upgrading it further is not a possibility right now. I am trying to upgrade the JWebAssembly-Gradle for use. The old code had:

plugins {
  id "com.gradle.plugin-publish" version "0.20.0"
}

pluginBundle {
    website = '<https://github.com/i-net-software/JWebAssembly-Gradle>'
    vcsUrl = '<https://github.com/i-net-software/JWebAssembly-Gradle>'
    description = 'A Gradle plugin for the JWebAssembly compiler. A Java bytecode to WebAssembly converter. It produce the WASM and JavaScript file from your *.java, *.class and/or *.jar files.'
    tags = ['jwebassembly', 'webassembly', 'wasm', 'java', 'bytecode', 'compile', 'converter', 'transpiler' ]

    plugins {
        jwebassemblerPlugin {
            id = 'de.inetsoftware.jwebassembly'
            displayName = 'Gradle JWebAssembly plugin'
            tags = ['jwebassembly', 'webassembly', 'wasm', 'java', 'bytecode', 'compile', 'converter', 'transpiler' ]
        }
    }
    mavenCoordinates {
        artifactId = archivesBaseName
    }
}