use stable release of popup bubble lib

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

app/build.gradle

@@ -267,7 +267,7 @@ dependencies {
     implementation 'com.novoda:merlin:1.2.1'
 
     implementation 'com.github.Kennyc1012:BottomSheet:2.4.1'
-    implementation 'com.github.nextcloud:PopupBubble:master-SNAPSHOT'
+    implementation 'com.github.nextcloud:PopupBubble:1.0.6'
     implementation 'com.amulyakhare:com.amulyakhare.textdrawable:1.0.1'
 
     implementation('eu.medsea.mimeutil:mime-util:2.1.3', {