NotifyBark failed when Bark server is in non-standard port

[spin6lock]

https://github.com/caronc/apprise/blob/9c145a842ed605ecd9452a2999fd88b632d74cee/apprise/plugins/NotifyBark.py#L216-L217 This code would generate url like this:

#generate by -vvv
Bark POST URL: http://localhost/push:8080 (cert_verify=True)

which should be: http://localhost:8080/push/ according to Bark API v2