* updated channel group instance initialization which allow to shorthand and pass "namespace:group-name" and it will be parsed to corresponding parameters
[#81044820]
* updated information about source code base branch and commit SHA
[#81044820]
[#81762590] Added test.
[#82291096] * updated channel view logic in case of channels switch
* channel group will be nil in case if forbidden character will be used for channel group name or namespace name. Also will be nil in case if channelGroupWithName: will be used with wrong format (not "namespace name:group name" format)
* added new error handling for case when stream controller not enabled on server
[#81762590] Improve channel group test.
Merge branch 'feature-pt81044820' of github.com:pubnub/objective-c into feature-pt81044820
[#81762590] Improve channel group test.