Update net.wooga.plugins to version 3.x

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-version`
would become `net.wooga.gradle:version`.

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

@@ -14,16 +14,9 @@
  * limitations under the License.
  *
  */
-buildscript {
-    configurations.all {
-        resolutionStrategy {
-            force 'org.ajoberstar.grgit:grgit-core:4.1.1'
-        }
-    }
-}
 
 plugins {
-    id 'net.wooga.plugins' version '2.2.4'
+    id 'net.wooga.plugins' version '3.1.0'
     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"
@@ -36,18 +29,21 @@ description = 'a slack plugin for Gradle.'
 pluginBundle {
     website = 'https://wooga.github.io/atlas-version/'
     vcsUrl = 'https://github.com/wooga/atlas-version'
-    tags = []
+    tags = ['semver', 'git', 'version', 'versioning']
+}
 
+gradlePlugin {
     plugins {
         version {
             id = 'net.wooga.version'
             displayName = 'Wooga Version plugin'
             description = 'Infer a project\'s version from your Git repository'
-            tags = ['semver', 'git', 'version', 'versioning']
+            implementationClass = 'wooga.gradle.version.VersionPlugin'
         }
     }
 }
 
+
 github {
     repositoryName = "wooga/atlas-version"
 }

settings.gradle

@@ -22,4 +22,4 @@ include 'api'
 include 'services:webservice'
 */
 
-rootProject.name = 'atlas-version'
+rootProject.name = 'version'