v1.1.2: moved the robovm gradle plugin declaration to fix a build error

build.gradle

@@ -5,7 +5,6 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:7.0.3'
-        classpath 'com.mobidevelop.robovm:robovm-gradle-plugin:2.3.13'
     }
 }
 

ios/build.gradle

@@ -1,3 +1,12 @@
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath "com.mobidevelop.robovm:robovm-gradle-plugin:$robovmVersion"
+    }
+}
+
 apply plugin: "java"
 apply plugin: "robovm"