Release v0.1.2

This release is compatible with linkml-project-cookiecutter. For more on the 0.1.x series see also the notes on Release 0.1.0.

What's Changed

• Readme update on Poetry; update gitignore in created project by @dalito in https://github.com/dalito/linkml-project-copier/pull/20
• Add validator for main_schema_class by @dalito in https://github.com/dalito/linkml-project-copier/pull/21

Full Changelog: dalito/linkml-project-copier@v0.1.1...v0.1.2