Openfisca-france-data

- Migration to the new syntax
- Deprecation of `entity_key_plural`

- Use of [RSA](https://www.legifrance.gouv.fr/affichCode.do?idArticle=LEGIARTI000031694448&idSectionTA=LEGISCTA000006178378&cidTexte=LEGITEXT000006074069&dateTexte=20190216)'s "âge limite" to constitute a family

- Add missing before_deploy (tagging)

- Activate deployment (tagging)

- Really add automatic version tagging (bump)

- Add automatic version tagging