dev-python/async_timeout: Bump to 4.0.0a3

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/async_timeout/Manifest

@@ -1 +1,2 @@
 DIST async-timeout-3.0.1.tar.gz 9724 BLAKE2B f18ae75969b7048469fe22949f25ea25da3fdbf08b98a16b5d5ffe823060a75e6de9ed764727e08d4344c79426e9c89013d49522f20ed62e6fbe912b5c7a8787 SHA512 fd30842671a79edfd52c7350e7fb2120533a6d97b44975f7b071ce2cbde43443bd5bbe1f2ad0ad3ab2156e1987b9e58e0c149b0ecfea8674eb0cb78eee79c986
+DIST async-timeout-4.0.0a3.tar.gz 11386 BLAKE2B 8918878c4edd64c70d831ddd05e3235c3c7cc116a99755205b7624df52cacfb61bf4e80083c85d93e420fbf18e7da16ee3ebc796c5a4890e2801885b670a494a SHA512 04775ea30ffba90a4b604ef040df24a6a2711fd3e2c3b45d1ab87ae3487f216458f44bbfb2c85498bef286acca90af43d8b3b95cf22244027c0a48494ef84e7a

dev-python/async_timeout/async_timeout-4.0.0_alpha3.ebuild

@@ -0,0 +1,36 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{8..10} pypy3 )
+inherit distutils-r1
+
+MY_P=${PN/_/-}-${PV/_alpha/a}
+DESCRIPTION="Timeout context manager for asyncio programs"
+HOMEPAGE="https://github.com/aio-libs/async-timeout"
+SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${MY_P}.tar.gz"
+S=${WORKDIR}/${MY_P}
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~ppc ~ppc64 ~riscv ~sparc ~x86 ~x64-macos"
+
+BDEPEND="
+	dev-python/setuptools_scm[${PYTHON_USEDEP}]
+	test? (
+		dev-python/pytest-aiohttp[${PYTHON_USEDEP}]
+		dev-python/pytest-asyncio[${PYTHON_USEDEP}]
+	)"
+
+distutils_enable_tests pytest
+
+python_prepare_all() {
+	# remove pointless dep on pytest-cov
+	sed -i -e '/addopts/d' setup.cfg || die
+	distutils-r1_python_prepare_all
+}
+
+python_test() {
+	epytest -p no:aiohttp
+}