Remove unneeded patch.
Add new check dependency on pytest and adapt pytest call accordingly.

Signed-off-by: David Runge <dvzrv@archlinux.org>

Rebuild to use the correct checksum for the auto-generated tarball from github.
The previous checksums were those of the sdist tarball from PyPI:
https://bugs.archlinux.org/task/79226

Switch to cython0 as upstream doesn't support cython >= 3.0.0.
Use bash arrays with one entry per line for easier handling.
Remove unneeded curly braces.
Switch to PEP517.

Simplify calls in functions.
Simplify quoting in file.
Run tests directly (do not use legacy setup.py).

Tests recompile the bytecode generated in build() and embed a different build
path. Avoid writing any bytecode in check() at all so that it doesn't matter
whether the test suite is run or not.

These packages' sites were all verified as https:// functional

FTR, commands used to change arch=() and then verify the changes:

$ sed -Ei "/^arch=/{s/ *?['\"]?i686['\"]? *?//;s/ *$//}" */*/PKGBUILD*

$ grep -r i686 * | grep arch= | grep -v repos

$ svn diff | grep -A 1 ^-[^-] | grep -v -- -- | cut -c2- |
  while IFS=$'\n' read -r l1; IFS=$'\n' read -r l2; do
    echo "$l1 -> $l2"
  done | sort -u

- ensure libyaml is used by enforcing it
- adding -O1