Migration to version 15.0

[OCA-git-bot]

Todo

https://github.com/OCA/maintainer-tools/wiki/Migration-to-version-15.0

Modules to migrate

• account_budget_oca - By @ikapasi-initos - 15.0 mig account budget oca #55

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

[flachica]

account_budget_oca #56