• Major new feature and breaking change: Legacy MP API is no longer supported. Pymatgen also no longer support mp-api in the backend. Instead, Pymatgen's MPRester now
  has nearly 100% feature parity with mp-api's document searches. One major difference is that pymatgen's MPRester will follow the documented REST API end points exactly, i.e., users just need to refer to https://api.materialsproject.org/docs for the exact field names.
• PR #4360 Speed up Vasprun parsing by @kavanase
• PR #4343 Drop duplicate iupac_ordering entries in core.periodic_table.json by @DanielYang59
• PR #4348 Remove deprecated grain boundary analysis by @DanielYang59
• PR #4357 Fix circular import of SymmOp by @DanielYang59