Yatter

Small improvements for the inverse translation

Fixing some bugs, such as 79.
Inverse translation now supports joins without conditions, required for PPDS

Testing new PyPI workflow

Support of blank node (`rr:termType rr:BlankNode`) in subject and object maps

Yatter now supports Geo[R2]RML (Shapefiles and its corresponding `rml:referenceFormulation` 59). This release also fixes 58 and 60

The first stable version of the translator. It includes:
- Direct translation: YARRRML to R2RML and RML (core, star, target, functions, dynamic datatype, and dynamic language)
- Inverse translation: R2RML and RML (core, star, dynamic datatype, dynamic language) to YARRRML
- 56 tests integrated into CI/CD
- Codevoc >80%
- Inline joins ([normal](https://github.com/oeg-upm/yarrrml-translator/blob/main/test/rml-fnml/YARRRMLTC-0049/mapping.yml) and [star](https://github.com/oeg-upm/yarrrml-translator/blob/main/test/rml-fnml/YARRRMLTC-0050/mapping.yml) ones) using functions.
- The translation changes its name from YARRMRL-translator to Yatter