Astrodbkit2

What's Changed
* Add Versions table as a new reference table

**Full Changelog**: https://github.com/dr-rodriguez/AstrodbKit2/compare/v0.3...v0.3.1

What's Changed
* Generic string search by dr-rodriguez in https://github.com/dr-rodriguez/AstrodbKit2/pull/47
* Fix pandas column names by dr-rodriguez in https://github.com/dr-rodriguez/AstrodbKit2/pull/48
* Fix SpeX spectrum flux units

**Full Changelog**: https://github.com/dr-rodriguez/AstrodbKit2/compare/v0.2.6...v0.3

What's Changed
* Add in-memory database as workaround for 40 by blackwer in https://github.com/dr-rodriguez/AstrodbKit2/pull/44

**Full Changelog**: https://github.com/dr-rodriguez/AstrodbKit2/compare/v0.2.5...v0.2.6

What's Changed
* Add serializer for bytes objects by dr-rodriguez in https://github.com/dr-rodriguez/AstrodbKit2/pull/43


**Full Changelog**: https://github.com/dr-rodriguez/AstrodbKit2/compare/v0.2.4...v0.2.5

Updating Astrodbkit2 to expand the list of known reference tables and add a method, `save_reference_table`, to output the json of a single reference table without needing to output the full database.

Release to better handle loading and saving the database. Adds a progress bar and ignore hidden and non-json files.