New package: py-aiocontextvars (#30815)

* [py-aiocontextvars] New package

* [py-aiocontextvars] Added types

* [py-aiocontextvars]

- removed test dependencies
- flake8

* [py-aiocontextvars] fixed dependency types

* [py-aiocontextvars] spack -> spack.package

* [py-aiocontextvars] depends on setuptools

Co-authored-by: James A Zilberman <jazrc@rit.edu>

var/spack/repos/builtin/packages/py-aiocontextvars/package.py

@@ -0,0 +1,21 @@
+# Copyright 2013-2022 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class PyAiocontextvars(PythonPackage):
+    """This library experimentally provides the missing asyncio support for
+    the contextvars backport library."""
+
+    homepage = "https://github.com/fantix/aiocontextvars"
+    pypi     = "aiocontextvars/aiocontextvars-0.2.2.tar.gz"
+
+    version('0.2.2', sha256='f027372dc48641f683c559f247bd84962becaacdc9ba711d583c3871fb5652aa')
+
+    depends_on('python@3.5:', type=('build', 'run'))
+    depends_on('py-setuptools', type='build')
+    depends_on('py-contextvars@2.4', when='^python@:3.6', type=('build', 'run'))
+    depends_on('py-pytest-runner', type='build')