Minor version update
- Fixed bugs in non-diagonal scaling matrices
- Implemented a Github action (workflow for pytest).
- Implemented test_benchmark in test_core.py (checking consistencies between SHRY and Supercell packages)
- Default value of SHRY_TOLERANCE changes 0.05 -> 0.01 angstrom
- Implemented a Github action (workflow for automatic deploy to PyPI).
- Update Readme.rst (how to release shry to PyPI)