Minor update to resolve compatibility with libalpm callback api.

This release adds compatibility with libalpm v13 and is not backwards
compatible.

It is easier to read if you don't need to try to figure out the flow of
a list of strings, and the non-issueful setuptools.Extension()
invocation, as they relate to __main__.

It's declarative and easier to read, and comes with convenient helper
functions for reading files.

The source code headers all state "or later", though some specify 2+ and
some specify 3+.

Signed-off-by: Jelle van der Waa <jelle@archlinux.org>

Update releasing document and add GPG signed releases, fix classifiers
for PyPi upload.

Signed-off-by: Jelle van der Waa <jelle@archlinux.org>

Fix setup.py not being able to include README.md and revamp the README
instructions by adding tests, build instructions and more.

This reverts commit 060be2d1.

It seems readthedocs does not support Python 3.7 yet, so remove the
usage of f-strings.

The pyalpm version variable in setup can be used as a blessed version
value to simplify maintainability. Refactor the setup.py method with a
guard when run as main, and import the setup module to populate the
version variable.

distutils is deprecated upstream.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>

Add setup.py classifiers, description and bump pyalpm version.

Fix keyword assignment, remove spaces around the =.

Ignore the casting of functions warnings due to PyCFunctionWithKeywords
being cast to PyCFunction.

Add the ability to run the unittests from setup.py.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>

Remove unused function and remove the the compiler flag to ignore unused
functions.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>

-Werror can be enabled by including pyconfig.h in db, package,
transaction.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>

Since Python 3.6 the toolchain requires some C99 support to build.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>

Signed-off-by: Rémy Oudompheng <remy@archlinux.org>