rdkit/rdkit: 2021_03_3 (Q1 2021) Release

Release_2021.03.2 (Changes relative to Release_2021.03.2) Acknowledgements Jason Biggs, James Davidson, Harrison Green, Brian Kelley, Stephanie Labouille, Dan Nealschneider, Maximilian Peters, Ricardo Rodriguez-Schmidt Riccardo Sabatini, Peter St. John, Paolo Tosco, Ivan Tubert-Brohman, Rachel Walker, Maciej Wójcikowski, Bug Fixes: Double bond stereo gets flipped by SMILES reader/writer (github #3967 from mwojcikowski) StereoGroups not preserved by RenumberAtoms() (github #4071 from greglandrum) HCount field in v2000 Mol blocks ignored (github #4099 from riccardosabatini) Reactions don't propagate bond properties (github #4114 from d-b-w) SEGV in ROMol::getAtomDegree if atom is not in graph (github #4127 from hgarrereyn) SEGV from unsigned integer overflow in Conformer::setAtomPos (github #4128 from hgarrereyn) HCOUNT from v3000 CTABS incorrectly interpreted (github #4131 from greglandrum) Empty query produces empty match, but at the same time is considered non-matching (github #4138 from i-tub) fixed AddBond documentation (github #4142 from Ashafix) Possible bug with EnumerateStereoisomers (github #4144 from stephanielabouille) Odd drawing behavior with radicals and MolsToGridImage (github #4156 from pstjohn) pre-condition violation when sanitizing a de-pickled reaction (github #4162 from jasondbiggs) Many of the PMI descriptors are not being recalculated for different conformers (github #4167 from greglandrum) Fix python to C++ pointer conversion issue in moldrawFromQPainter (github #4182 from rachelnwalker) Potentially chiral bridgehead atoms not being identified. (github #4192 from greglandrum) allow more recoverable V3000 parsing errors when strictParsing=false (github #4210 from greglandrum) RGD: Fix memory leak with deleting array (github #4211 from bp-kelley) UnfoldedRDKFingerprintCountBased returns a different fingerprint length for every molecule (github #4212 from greglandrum) rdMolHash.MolHash fails on non-standard valences (github #4222 from ricrogz