Events: Use statuses for events filtering

[iLLiCiTiT]

Changelog Description

Use statuses instead of states for events filtering.

Additional review information

The statuses fitler is available in current develop (first release after 1.5.6) where states becomes deprecated filter and should not be used anymore.

Use statuses as default argument in get_events, but still support states with deprecation warning.

Testing notes:

1. Use statuses in get_events.
2. It should automatically use states or statuses GraphQl filter based on server version.