Improvements for Bio-Logic data files:
- #68 Add column 174 'Ewe/V'
- #71 Add more column types
- #75 Add "step time/s" column
- #86 Fixed syntax error typo
- #88 Add ID 505 and 509 from EC-Lab
- #98 add support for column 27: E_we-E_ce/V
General improvements:
- #58 Store all the test data in the git repo using git-lfs
- #90 Add tox-gh based CI workflow
- #96 Format with black