Urbanairship

- NOTE: This is in support of a breaking change to the email registration API.
Version 5.0.0 will not be able to register email channel ids.
Please upgrade.
- Added new commercial and transactional opt-in and opt-out date fields for
registration.
- Removed opt_in_level field for email registration.

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- Added support for Push Time Send Optimization
- Added support for iOS 12 overrides
- Added support for push to Sms
- Added support for Sms channel registration, opt-out and uninstall
- Added support for Sms channel lookup
- Added support for email channel registration
- Added support for email channel uninstall
- Added support for email channel tag add, remove and set
- Added validation for key and secrets
- Added tests for error responses
- Removed support for Python 3.3.x
- Removed previously deprecated Tag, ListTag, BatchTag and DeleteTag objects

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- Added conditional test to core.py to fix scheduled url issue

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- Added Automation API support
- Updated Open Channel tag actions
- Removed Feedback API
- Renamed response_statistics.py to reports.py

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- Added support for Campaigns
- Added support for uninstalling an Open Channel

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- Fixed Web Notify require_interaction field name

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