Bump version 12.0.1.2.1

CHANGELOG:

## [12.0.1.2.1] - 2021-04-28
### Added
- [#476](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/476) Add location filter to activities board

### Changed
- [#474](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/474) Add partner filters and remove invoice_partner_id from contract holder change wizard
- [#452](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/452) Update OC with just the email or iban changed through wizards
- [#443](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/443) Refactor CRMAccountHierarchyFromContractService class and rename it to CRMAccountHierarchyFromContractCreateService

### Removed
- [#480](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/480) Remove the manual action to publish the package in PyPI

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