Pypact

What's Changed
* Lineplotter attr custom resolving issue 46 by PeBoch in https://github.com/fispact/pypact/pull/47
* Bug metastable plotting by PeBoch in https://github.com/fispact/pypact/pull/49
* Fix plot example in README and fix GitHub actions by thomasms in https://github.com/fispact/pypact/pull/52
* Update README ready for latest release by thomasms in https://github.com/fispact/pypact/pull/53

New Contributors
* PeBoch made their first contribution in https://github.com/fispact/pypact/pull/47

**Full Changelog**: https://github.com/fispact/pypact/compare/1.3.6...1.3.7

Small fixes.

Added a name and zai property to Nuclide for convenience.

Instead of:
python
name = f"{nuc.element}{nuc.isotope}{nuc.state}"

we can now do:

python
name = nuc.name

Fix to fispactconverter tool.

Fixes with extra features:
* Group convert (similar implementation to FISPACT-II with some improvements)
* Read volumetric gamma production rates
* Added a simple library of 60+ precooked spectra (fission + fusion) based on FISPACT-II website.

Added Printlib4 and Printlib5 readers.
Small bug fixes to gamma spec from version 1.3.1