Pymatgen

* Add validation and extrapolation for stitching XAS (yimingcheng)
* Better error handling and possibly verbose warning to get_structure_by_material_id

* Bug fix for boltztrap2 spin support. (fraricci)

* EwaldSummation is now MSONable (lbluque).
* Fix for QChem freq parsing (samblau)
* Much improved linting and workflows.

* Bug fix: serialization of slabs (utf)
* Bug fix: enumlib url (wsyxbcl)
* Bug fix: change in tolerance for Lattice comparison (mbjumar)
* Bug fix: k-path division by zero (mfherbst)
* New: support for openbabel 3.0 (orioncohen)

* Make Slabs properly serializable in as_dict. Fixes 1892.
* Fixes for Critic2Caller (yuuukuma)
* Add cost data for He, H, Ar, Ne, Kr, Tc (computron)
* Parse scientific notation in OUTCAR (possibly without spaces in between)
* Spin support for boltztrap2 (fraricci)
* New static method to generate basis functions Lobster (JaGeo)
* SLME and spillage analysis (knc6)

* New: Support for parsing WAVECARS with spin-orbit coupling (mturiansky, 1861)
* New: Support to convert WAVECAR to wannier90 UNK files (mturiansky, 1861)
* New: Site-weighted XAS spectrum (yimingchen95, 1837)
* Fixed: Elfcar serialization (ayushgupta, 1859)
* Fixed: Units in label for phonon plot (ab5424, 1857)
* Fixed: StructureMatcher serialization (lbluque, 1850)
* Fixed: Comment string in KPOINTS file (Andrew-S-Rosen, 1842)
* Fixed: parsing of dielectric function in VASP output (computron, 1836)