version bump to 2.13.0-beta

this is just a beta release to test the Google Play policies wrt Android 14

build.gradle

@@ -92,13 +92,13 @@ ext {
 
 android {
     namespace 'eu.siacs.conversations'
-    compileSdkVersion 34
+    compileSdk 34
 
     defaultConfig {
         minSdkVersion 21
         targetSdkVersion 34
-        versionCode 42077
-        versionName "2.12.12"
+        versionCode 42078
+        versionName "2.13.0-beta"
         archivesBaseName += "-$versionName"
         applicationId "eu.siacs.conversations"
         resValue "string", "applicationId", applicationId
@@ -112,6 +112,7 @@ android {
             universalApk true
             enable true
             reset()
+            //noinspection ChromeOsAbiSupport
             include project.ext.abiCodes.keySet() as String[]
         }
     }
@@ -130,7 +131,8 @@ android {
         targetCompatibility JavaVersion.VERSION_17
     }
 
-    flavorDimensions("mode", "distribution")
+    flavorDimensions += "mode"
+    flavorDimensions += "distribution"
 
     productFlavors {