including:
- simplify type hierarchy, merging the frozen types into the base types
- upgrade to latest hypothesis (3.38.0)
- use Reversible for order-sensitive FrozenOrderedBidict.__eq__
- fix bug where bidict._on_dup_kv was not set to ON_DUP_VAL as documented
- drop leading underscore from attrs that should be public
- improve setup.py/metadata
- rename DuplicationBehavior -> DuplicationPolicy
- drop ON_DUP_VAL duplication policy in preference to just using None
- reduce ordered bidict memory usage and speed up copy
- .travis.yml and setup.py tweaks
- add regression tests for -O bug and document fix
- Make OrderedBidict equality comparison order-sensitive in more cases.
- Add bidict.BidictBase.ordered class attribute.
- Replacing OrderedBidictBase._should_compare_order_sensitive()
with OrderedBidictBase.should_compare_order_sensitive_to().
- Revert the optimizations in v0.13.0 to make FrozenOrderedBidict instances
that have the same items in different order have different hash values.
- Remove FrozenBidictBase.
- Remove frozenbidict._USE_ITEMSVIEW_HASH and
frozenorderedbidict._HASH_NITEMS_MAX
jab