- vegaexpr: support date functions () string functions (#21, #22), stats functions (#24), array functions (#26, #27), regex functions (#28)
- support sequence generators (#25)
- Support full set of bin options (#14)
- Support extraction of implicit transforms from encodings (#10, #12, #13, #15, #29, #33)
- Fix issue with fold transform (#5)
- Compatibility with Python 3.6 & 3.8 (#16 & #17)
- Format package with black (#11)
Initial release, supporting most transforms from Altair 3.X