Version 4.4.2

• Add cleavage rules from MS ontology as pyteomics.parser.psims_rules. parser.cleave now understands keys and accessions from psims_rules as rules.

• Improve mzIdentML parser performance (and possibly others in some cases) by relying more on offset indexes (#34 by @mobiusklein).

• Extend the pyteomics.mztab.MzTab parser with auto-generated properties. Almost all metadata entities are now exposed as properties on the parser object (#23 by @mobiusklein).

• Fix the version parsing in pyteomics.mztab to support shorter MzTab version strings (#24 by @donnyyy777).

• Tweak the pyteomics.pepxml.PepXML parser to present some values that were previously reported as None.

• Fix compatibility with SQLAlchemy 1.4 (#32 by @mobiusklein).