Migration to version 16.0

[sbidoul]

Todo

https://github.com/OCA/maintainer-tools/wiki/Migration-to-version-16.0

Modules to migrate

Missing module? Check https://github.com/OCA/maintainer-tools/wiki/%5BFAQ%5D-Missing-modules-in-migration-issue-list

• calendar_event_link_base - By @cvinh - [16.0][MIG] calendar_event_link_base #115
• resource_booking - By @victoralmau - [16.0][MIG] resource_booking: Migration to 16.0 #120