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Affine transformation matrices

Results 15 affine issues
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A faster implementation of `Affine.__new__`. ``` %timeit Affine(3, 2, 5, 1, 2, 3) 1.21 µs ± 48.9 ns per loop (mean ± std. dev. of 7 runs, 1,000,000 loops each)...

👋 I saw https://github.com/mapbox/mercantile/issues/140 and since @sgillies was receptive to the idea of adding type hints, I thought I'd also start a discussion here about adding type hints 🙂 ....

An alternative proposal to #66 is to use [flit](https://github.com/takluyver/flit) for packaging. Building is similar: ```bash $ python3 -m pip install --upgrade build ... $ python3 -m build * Creating venv...

Planar had some nice HTML docs https://pythonhosted.org/planar/transforms.html I'm not sure how the above docs are generated, if they are something standard it may be worth moving docs to readthedocs. It...

Breaking changes like removal of `__rmul__`.

Remove python 2.7 from the build matrix and import Sequence only from collections.abc.

The lowest python version with test is python 3.6. So define this as minimum required version. Closes #49

Probably a typo in the configuration.

I wanted to use Pydantic validators for making data types. However, it does not work properly in Affine 2.3.1: ``` from pydantic import BaseModel from affine import identity class Transform(BaseModel):...