First stable release of _pyquadkey2_ after forking.
**Featuring:**
* ✅ Several (critical) [bug fixes](https://github.com/buckhx/QuadKey/pull/15)
* ✅ Python 3 support
* ✅ [Type hints](https://docs.python.org/3.6/library/typing.html) for all methods
* ✅ Higher test coverage
* ✅ Cython backend for improved performance
* ✅ 64-bit integer representation of QuadKeys
* ✅ Additional features and convenience methods
**Assets:**
* Source archive
* Linux builds for Python 3.6 and 3.7