Update net.wooga.plugins to version 3.x (#57)

Description
===========

This update will bring the plugin `net.wooga.plugins` to
version `3.x`. With this change the groupname of the gradle
plugin will change during publish so I thought it might be
a good idea to change the project name as well so the groupname
won't include the `atlas` name.

The old groupname `gradle.plugin.net.wooga.gradle:atlas-appcenter`
would become `net.wooga.gradle:appcenter`.

This patch also includes all changes needed for the new
plugin metadata description.

Changes
=======

* ![UPDATE] `net.wooga.plugins` to version `3.x` range
* ![CHANGE] project name and remove `atlas` term
* ![IMPROVE] plugin publish metadata

build.gradle

@@ -15,7 +15,7 @@
  */
 
 plugins {
-    id "net.wooga.plugins" version "2.3.0"
+    id "net.wooga.plugins" version "3.2.0"
     id 'net.wooga.snyk' version '0.10.0'
     id "net.wooga.snyk-gradle-plugin" version "0.2.0"
     id "net.wooga.cve-dependency-resolution" version "0.4.0"
@@ -28,12 +28,15 @@ pluginBundle {
     website = 'https://wooga.github.io/atlas-appcenter/'
     vcsUrl = 'https://github.com/wooga/atlas-appcenter'
     tags = ['AppCenter']
+}
 
+gradlePlugin {
     plugins {
         appcenter {
             id = 'net.wooga.appcenter'
             displayName = 'Gradle AppCenter plugin'
             description = 'This plugin provides tasks for uploading a build to AppCenter'
+            implementationClass = 'wooga.gradle.appcenter.AppCenterPlugin'
         }
     }
 }

settings.gradle

@@ -20,4 +20,4 @@ pluginManagement {
   }
 }
 
-rootProject.name = 'atlas-appcenter'
+rootProject.name = 'appcenter'

src/main/groovy/wooga/gradle/appcenter/AppCenterSpec.groovy

@@ -26,9 +26,9 @@ import org.gradle.api.tasks.Optional
 
 trait AppCenterSpec extends BaseSpec {
 
-    @Input
     private final Property<String> apiToken = objects.property(String)
 
+    @Input
     Property<String> getApiToken() {
         apiToken
     }
@@ -41,9 +41,9 @@ trait AppCenterSpec extends BaseSpec {
         apiToken.set(value)
     }
 
-    @Input
     private final Property<String> owner = objects.property(String)
 
+    @Input
     Property<String> getOwner() {
         owner
     }
@@ -56,9 +56,9 @@ trait AppCenterSpec extends BaseSpec {
         owner.set(value)
     }
 
-    @Input
     private final Property<String> applicationIdentifier = objects.property(String)
 
+    @Input
     Property<String> getApplicationIdentifier() {
         applicationIdentifier
     }

src/main/groovy/wooga/gradle/appcenter/tasks/AppCenterUploadTask.groovy

@@ -33,8 +33,12 @@ import wooga.gradle.appcenter.api.AppCenterRetryStrategy
 
 class AppCenterUploadTask extends DefaultTask implements AppCenterTaskSpec {
 
+    private final DirectoryProperty outputDir
+
     @Internal
-    protected final DirectoryProperty outputDir
+    protected DirectoryProperty getOutputDir() {
+        outputDir
+    }
 
     @OutputFile
     final Provider<RegularFile> uploadVersionMetaData