Log Message:
py-bitstring: updated to 4.1.3

version 4.1.3
A maintenance release, with some changes to the beta features introduced in 4.1.

* Removed a couple of files that accidentally got included in the previous release.
* The 8-bit float formats have been renamed 'e4m3float' and 'e5m2float'.
* Some refactoring and performance optimizations.