[AppDB] 4/5 Remove 'maintainer' from version rating fields

[Alexander Nicolaysen Sørnes]

Change the version rating fields to reflect the removal of maintainer ratings.



Alexander N. Sørnes


The following SQL is required

ALTER TABLE `appVersion` CHANGE `maintainer_rating` `rating` TEXT NULL DEFAULT 
NULL

ALTER TABLE `appVersion` CHANGE `maintainer_release` `ratingRelease` TEXT NULL 
DEFAULT NULL