v0.139.0

GraphQL API changes:

• ➕ ProjectMedia type: added field creator_name, type string, with the name of the user who created the item
• ➕ ProjectMedia type: added field channel, with the integer value that represents the immutable channel from which this item came from (list of possible channel values available at https://github.com/meedan/check-api/blob/develop/lib/check_channels.rb)
• ➖ Project type: deleted field auto_tasks
• ➕ Team type: added field sources_count, of type integer, which returns the number of sources under a team, optionally matching a keyword