Log Message:
py-bitstring: updated to 4.2.2

4.2.2

A couple more minor bug fixes.

* Sometimes a ValueError was being raised instead of a ReadError.
* Initialising a bitstring from None now raises a TypeError rather than generating
  an empty bitstring.
* Fixed performance regression for find/findall in some situations.
* Fix for AttributeError bug when combining Bits with BitStream.