Linear scaling for RGB Images

Allow fits_to_img to take a list of zmin and zmax parameters (one for each color channel) when creating an RGB stack.

0.4.8

update setup.py tag to 0.4.8

0.4.7

What's Changed

• new fits_to_tif function, fits_to_jpg moved outside and fits_to_img supports both with new filetype parameter by @LTDakin in #9
• update publish pypi action by @LTDakin in #10
• ANTIALIAS has been deprecated; using LANCZOS by @zemogle in #8

New Contributors

• @LTDakin made their first contribution in #9

Full Changelog: 0.4.6...0.4.7