Release pydicti v1.2.1

- fix incorrect behaviour of ``__or__`` and ``__ior__``, see #8

Release pydicti v1.2.0

- add type hints

Release pydicti v1.1.6

- update the badges on the landing page

Release pydicti v1.1.5

- maintenance release for testing automatic releases using GitHub Actions

Release pydicti 1.1.4

- use ``str.casefold()`` on python3
- make normalization function a parameter of ``build_dict``, so that
  user-defined normalization functions can be passed

Release pydicti 1.1.3

- avoid key recomputation in ``__setitem__``

Release pydicti 1.1.2

- leave item order invariant under assignment in odicti (#2)
- leave key case invariant under assignment

Release pydicti 1.1.1

- fix deprecated MutableMapping import (error on py38)

Release pydicti 1.1.0

- drop py2.6 support
- fix version number in long_description

Release pydicti 1.0.0

- make str representation more dict-like
- misc cleanup