Python >= 3.7, update type anno

v1.5.1

Python >= 3.7 anno, src layout

refactor

• black code style
• put functions into multiple files for easier management (all one import still)

CI template Github Action

• apply best practices for python projects
• move CI to github actions

Py35 compatible, modularize

• Add PyPy3 and Python 3.5 compatibility
• modularize
• remove mandatory timezone components

Robustness

• improve test coverage and types tested

modernize

• functionalize tests
• improve test coverage
• setup.cfg <= setup.py
• RST=>md

Enable arrays

Enable np.ndarray in/out for most functions.

Timezone naive expected

Due to upcoming changes in Numpy deprecating timezone-aware handling by numpy.datetime64, and the numerous essential libraries which depend on Numpy,
we have defaulted to timezone-naive.

The .forceutc() function still allows coercing to UTC if desired, but this is no longer used internally as it used to be.

Also CI now uses flake8 and mypy type checking. As usual, type checking helped uncover some corner cases.

handle datetime.date correctly too

v1.3.2

handle datetime.datetime vs datetime.date correctly

forceutc returns datetime.time unchanges

allow datetime.date that comes into forceutc() to return unchanged.