Build failed if using sonar-plugin-api ver-5.5 and above about gradle-sonar-packaging-plugin HOT 3 CLOSED

plugins {
  id "com.iadams.sonar-packaging" version "0.1.4"
}

repositories {
  mavenCentral()
}

dependencies {
  provided 'org.sonarsource.sonarqube:sonar-plugin-api:5.6'
}

version = '1.0'

sonarPackaging {
  pluginDir = "$buildDir/myServer"
  pluginKey = 'example'
  pluginClass = 'org.sonar.plugins.sample.SamplePlugin'
  pluginName = 'Example'
  pluginDescription = 'An Example Plugin!'
}

gradle clean build
:clean
:compileJava
Note: /Users/iwarapter/IdeaProjects/gradle-sonar-packaging-plugin-tests/src/main/java/org/sonar/plugins/sample/SamplePlugin.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
:processResources UP-TO-DATE
:classes
:jar
:pluginPackaging
Checking for sonar-plugin-api
-------------------------------------------------------
Plugin definition in update center
-------------------------------------------------------
Sonar Plugin Created.
:assemble
:compileTestJava UP-TO-DATE
:processTestResources UP-TO-DATE
:testClasses UP-TO-DATE
:test UP-TO-DATE
:check UP-TO-DATE
:build

BUILD SUCCESSFUL

Total time: 3.405 secs

buildscript {
    repositories {
        maven {
            url "https://plugins.gradle.org/m2/"
        }
    }
    dependencies {
        classpath "gradle.plugin.com.iadams.plugins:gradle-sonar-packaging-plugin:0.1.4"

    }
}

repositories {
    maven {
        url "https://plugins.gradle.org/m2/"
    }
}

apply plugin: 'com.iadams.sonar-packaging'
dependencies {
    compile 'org.sonarsource.sonarqube:sonar-plugin-api:5.6'
}

dependencies {
    provided 'org.sonarsource.sonarqube:sonar-plugin-api:5.6'
}