- Adds iOS platform options for: interruption_level, relevance_score, and target_content_id
- Adds amazon platform options for: notification_tag, notification_channel, icon, icon_color
- Adds audience selectors for date_attribute, text_attribute, and number_attribute
- Adds attributes, device_attributes, named_user_id, commercial_opted_in, commercial_opted_out, transactional_opted_in, transactional_opted_out to channel look up and listing.
- Adds support for setting attributes on channel ids and named user ids
- Adds support for removing attributes from channel ids and named user ids
- Deprecates location-based audience selectors: location, recent_date, absolute_date. These will be removed in version 6.0
- Deprecates class LocationFinder. This will be removed in version 6.0
- Deprecates support for Python 2. Support will be removed in version 6.0
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