notification.extras also contains non-string values

[frederikbosch]

The method getDeliveredNotifications() throws because getString(key) is called on notification.extras but the extras Bundle object contains more than just strings. Booleans cannot be casted to string, see the exception stack trace below.

Key android.progressIndeterminate expected String but value was a java.lang.Boolean.  The default value <null> was returned. 
Attempt to cast generated internal exception:
    java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
        at android.os.BaseBundle.getString(BaseBundle.java:1448)
        at com.capacitorjs.plugins.pushnotifications.PushNotificationsPlugin.getDeliveredNotifications(PushNotificationsPlugin.java:147)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.getcapacitor.PluginHandle.invoke(PluginHandle.java:138)
        at com.getcapacitor.Bridge.lambda$callPluginMethod$0(Bridge.java:837)
        at com.getcapacitor.Bridge.$r8$lambda$FNYM7cvgeBk0k8YXQH7M96Mrf-c(Unknown Source:0)
        at com.getcapacitor.Bridge$$ExternalSyntheticLambda0.run(D8$$SyntheticClass:0)
        at android.os.Handler.handleCallback(Handler.java:995)
        at android.os.Handler.dispatchMessage(Handler.java:103)
        at android.os.Looper.loopOnce(Looper.java:273)
        at android.os.Looper.loop(Looper.java:363)
        at android.os.HandlerThread.run(HandlerThread.java:85)