Updates Wikitude Cordova plugin to use Wikitude SDK 7.2.0;

Signed-off-by: Andreas Schacherbauer <andreas.schacherbauer@wikitude.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "com.wikitude.phonegap.wikitudeplugin",
-  "version": "7.1.0",
+  "version": "7.2.0",
   "description": "Augmented Reality Wikitude SDK Plugin \n        The Wikitude Cordova Plugin enables developers to embed an augmented reality view into their PhoneGap project. You can create a fully featured app with advanced augmented reality features, including image recognition, purely using HTML, CSS and JavaScript.\n    ",
   "cordova": {
     "id": "",

plugin.xml

@@ -2,7 +2,7 @@
 <plugin xmlns="http://www.phonegap.com/ns/plugins/1.0"
     xmlns:android="http://schemas.android.com/apk/res/android"
     id="com.wikitude.phonegap.WikitudePlugin"
-    version="7.1.0">
+    version="7.2.0">
 
     <name>Augmented Reality - Wikitude SDK Plugin</name>
 
@@ -20,7 +20,8 @@
 
     <engines>
       <engine name="cordova" version=">=3.0.0" />
-    </engines>  
+      <engine name="cordova-android" version=">=6.3.0"/>
+    </engines>
 
     <!-- copy WikitudePlugin wrapper file into www-folder -->
     <js-module src="www/WikitudePlugin.js" name="WikitudePlugin">
@@ -33,8 +34,11 @@
         <!-- declare implementation of WikitudePlugin -->
         <source-file src="src/android/WikitudePlugin.java" target-dir="src/com/wikitude/phonegap" />
 
+        <!-- copy wikitude sdk -->
+        <lib-file src="src/android/wikitudesdk.aar"/>
+
         <!-- copy build extras, necessary for wikitude.aar -->
-        <source-file src="src/android/libs/build-extras.gradle" target-dir="." />
+        <framework src="src/android/build-extras.gradle" custom="true" type="gradleReference" />
 
         <!-- add permissions and requirements -->
         <config-file target="AndroidManifest.xml" parent="/manifest">
@@ -64,11 +68,6 @@
             </activity>
         </config-file>
 
-
-        <!-- copy wikitude sdk -->
-        <source-file src="src/android/libs/wikitudesdk.aar" target-dir="libs/" />
-
-
         <!-- adds WikitudePlugin in project's config.xml -->
         <config-file target="res/xml/config.xml" parent="/*">
             <feature name="WikitudePlugin">