Bump version 12.0.1.8.8

CHANGELOG:

## [12.0.1.8.8] - 2022-04-04
### Added
- [#785](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/785) Subscription request sponsees limit validation
- [#784](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/784) Add sponsees number limitation
- [#779](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/779) Add sponsorship code
- [#643](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/643) Partner Email Change Endpoint

### Changed
- [#782](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/782) Fix EasyMyCoop version to 12.0.3.0.2.99.dev2 to aboid breaking changes.
- [#693](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/693) Invoice Line price unit set to amount untaxed
- [#692](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/692) Accept json as body param in application/x-www-form-urlencoded

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