added option to choose more emoji reactions

android/app/build.gradle

@@ -45,7 +45,7 @@ android {
         applicationId "eu.mhsl.marianum.mobile.client"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdkVersion 19
+        minSdkVersion 21
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName