SOMEF 0.9.6: Fix gitlab issues and TTL export

This release fixes issues with Gitlab repos and TTL export library problems.
It also converts the project into a poetry project to help reproducibility and library maintenance.

What's Changed

• SOMEF-639: Replace hardcoded config paths by @StankovskiA in #641
• Reverting nltk version to avoid problems by @dgarijo in #648
• updated yarrrml.yml by @juanjemdIos in #657
• yml mapping default by @juanjemdIos in #659
• Update constants.py by @juanjemdIos in #662
• Mapping json in memory instead of disk by @juanjemdIos in #665
• Update turtle_export sending dictionary directly. New rml.ttl by @juanjemdIos in #666
• Setup poetry envirnment by @kuefmz in #652
• Updated readme.md with instructions to install poetry by @juanjemdIos in #669
• updated apply_mapping and correct wrong version by @juanjemdIos in #675
• Pushing the fixes of instructions about "poetry shell" to dev branch by @Anas-Elhounsri in #682
• Resolve problem in codemeta export and buildinstrucctions. Fixes #677 by @juanjemdIos in #684
• New process and test to chek gitlab selfhosted. Fixes #687 by @juanjemdIos in #689

New Contributors

• @StankovskiA made their first contribution in #641
• @juanjemdIos made their first contribution in #657
• @Anas-Elhounsri made their first contribution in #682

Full Changelog: 0.9.5...0.9.6