Release 0.2.1

[marcofavorito]

Release summary

Version number: 0.2.1

Release details

• Replace parsing library PLY with Lark.

Checklist

Put an x in the boxes that apply.

• I have read the CONTRIBUTING doc
• I am making a pull request against the master branch (left side), from develop
• I've updated the dependencies versions in Pipfile to the latest, wherever is possible.
• Lint and unit tests pass locally
• I built the documentation and updated it with the latest changes
• I've added an item in HISTORY.md for this release
• I bumped the version number in the __version__.py file.
• I published the latest version on TestPyPI and checked that the following command work:
  pip install flloat==<version-number> --index-url https://test.pypi.org/simple --force --no-cache-dir --no-deps
• After merging the PR, I'll publish the build also on PyPI. Then, I'll make sure the following
  command will work:
  pip install flloat==<version_number> --force --no-cache-dir --no-deps

Further comments

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