- `aoa_to_sheet` function (fixes #314 h/t @fonzy2013 @rvdwijngaard)
- `writeFileAsync` function (fixes #396 h/t @barbalex)
- `sheet_to_json` tests + docs + blankrows (fixes #602 h/t @EEaglehouse)
- write number format scan now includes every index >= 50
- propagate SSF IE8 fixes (fixes #171 h/t @sheetjsdev)
- update shim for extendscript (see #603 h/t @firas3d)
- more flow type definitions