- Update to 2.1.1
* add type hinting (see PEP 484, 561) using stub (`.pyi`) files
- Update to 2.1.0
* add `.find()` method, see #122
* `.find()`, `.index()`, `.search()` and `.itersearch()` now all
except both (sub-) bitarray as well as bool items to be
searched for
* improve encode/decode error messages
* add [lexicographical permutations example](../examples/lexico.py)
- Update to 2.0.1
* update documentation
* improve some error messages
- Update to 2.0.0
* require more specific objects, int (0 or 1) or bool
* items are always returned as int 0 or 1
* remove `.length()` method (deprecated since 1.5.1 - use `len()`)
* in `.unpack()` the `one` argument now defaults to 0x01 (was 0xff)
* `.tolist()` now always returns a list of integers (0 or 1)
* fix frozenbitarray hash function, see #121
* fix frozenbitarray being mutable by `<<=` and `>>=`
* support sequence protocol in `.extend()` (and bitarray creation)
* improve OverflowError messages from `util.int2ba()`
* add [hexadecimal example](../examples/hexadecimal.py)