Upgrade to release 1.8.1:
- moved implementation of and `hex2ba()` and `ba2hex()` to C-level
- add `bitarray.util.parity()`
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Trevor Gamblin <trevor.gamblin@windriver.com>