Removed Py_IDENTIFIERs where there is a name conflict (TODO). Added

Package.swift

Python 3.5.10rc1

Python 3.7.9

Python 3.6.12

Python 3.9.0rc1

Python 3.9.0b5

Python 3.8.5

Python 3.8.4

Python 3.9.0b4

Python 3.8.4rc1