Added
- Update order 2 trace model and wavelength solution to provide full support
- jwst_niriss_gr700xd_order2_trace_refmodel_002.txt
- jwst_niriss_gr700xd_wavelength_model_order2_002.json
- updated demo notebook showcasing order 2 completeness
- update readme to reflect additions/changes
- removing support for python 3.9 upon Astropy being deprecating Python 3.9
so 3.10 will now be the the minimum version.
- also making additional to changes to some test and removing the duplicate
test folder that was present.