Log Message:
py-bitarray: updated to 3.0.0

3.0.0

* see [Bitarray 3 transition](bitarray3.rst)
* remove Python 2.7 support
* `.decode()` now returns iterator (equivalent to past `.iterdecode()`)
* `.search()` now returns iterator (equivalent to past `.itersearch()`)
* remove `.iterdecode()` and `.itersearch()`
* remove `util.rindex()`, use `.index(..., right=1)` instead,
  deprecated since 2.9
* remove `util.make_endian()`, use `bitarray(..., endian=...)` instead,
  deprecated since 2.9
* remove hackish support for `bitarray()` handling unpickling