Bump version 12.0.1.5.1

CHANGELOG:

## [12.0.1.5.1] - 2021-08-23
### Added
- [#581](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/581) Add service street, zip code and city filters to BA contracts

### Fixed
- [#593](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/593) Fix direct bytes case when it can base64 decoded right

### Changed
- [#592](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/592) Aged Partner Balance: group by partner, add vat

Related card: https://trello.com/c/XXXXXXXX/xjksdjflsdfksldfsdfs

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