pyproject.toml instead of setup.py for new packaging

This allows to build with meson and package for Pypi

Build like this:
    python -m build

Signed-off-by: Boris Glimcher <[email protected]>

Author: glimchb

libnvme/setup.py

@@ -0,0 +1,24 @@
+[build-system]
+requires = ["mesonpep517", "wheel", "meson", "ninja"] # PEP 508 specifications.
+build-backend = "mesonpep517.buildapi"
+
+[tool.mesonpep517.metadata]
+author="Hannes Reinecke"
+author-email="[email protected]"
+classifiers = [
+    "Intended Audience :: Developers",
+    "Development Status :: 5 - Production/Stable",
+    "License :: OSI Approved :: GNU Lesser General Public License v2 or later (LGPLv2+)",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.6",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+]
+description-file="README.md"
+home-page = "https://github.com/linux-nvme/libnvme"
+license="LGPL-2.1-or-later"
+requires-python=">=3.6"
+summary="python bindings for libnvme"
+