Dependency on biotite 1.4.0 requires pdbx_PDB_ins_code in atom_site type cifs

[averyyyang]

pdbx_PDB_ins_code is only found in 3% of cif files and is not considered a required field by official PDBx/mmCIF standards: https://mmcif.wwpdb.org/dictionaries/mmcif_pdbx_v50.dic/Items/_atom_site.pdbx_PDB_ins_code.html

Prior to version 1.7.0, biotite's get_structure, which AtomWorks depends on, hard-codes the assumption that this field exists, but this was fixed:
biotite-dev/biotite#869
biotite-dev/biotite#877

Would it be possible to update AtomWorks to support this version of biotite?