Upgrade to release 1.5.3:
- add optional index parameter to `.index()` to invert single bit
- fix `sys.getsizeof(bitarray)` by adding `.__sizeof__()`
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Acked-by: Trevor Gamblin <trevor.gamblin@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>