* added ability user to perform some short tasks right before PubNub client suspension on application entering background execution context
[#70807512]
Merge branch 'fix-pt73293212' into feature-73293212-70807512
[#70807512]
Merge remote-tracking branch 'origin/feature-pt70807512' into feature-73293212-70807512

Conflicts:
	iOS/iPadDemoApp/pubnub/Classes/Model/PNDataManager.m
Add test for bring to foreground mode.
Merge remote-tracking branch 'origin/develop' into feature-73293212-70807512
Copy libs.