dev-python/trollius: Bump to 2.2, remove py3 support

Bump to the last release which marks the project deprecated.  Remove py3
support since the package has no usefulness for py3, py3.6 fails tests
and py3.7 is entirely broken.

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

dev-python/trollius/Manifest

@@ -1 +1,2 @@
 DIST trollius-2.1.tar.gz 276425 BLAKE2B 3337712e482c19ce06bced64a4169effee74f8e6d33e60f4ab411d636acae586a104766639f63d0075fb12a39f09ed7e54c7396f3295aa99db04e0b60aa433fa SHA512 d800e060e13da22c83fc20f2c0e61d6c50cca309d90e8faecaf24e68240d78ec7fc9cfbb68a968ba7e9d73268e974353d9bd9063eb0ca02a4f0e88610abd6018
+DIST trollius-2.2.tar.gz 276391 BLAKE2B 8debb662498551f2bee85605388813bdcdb720f798b2e2e2cb16a86340fe2759b1a59abcbd6d302e96f6d9860a464c140a521b9a7e731579329351fd11baeebd SHA512 d4a123cc0728eb3548f434ca227a36afce0fca8bfc9fdb0005ff501538c8fad9507608112c4b63c7d273cec2d2310b941068093c9bbdf28d984001753b4956cb

dev-python/trollius/trollius-2.2.ebuild

@@ -0,0 +1,24 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python2_7 pypy )
+
+inherit distutils-r1
+
+DESCRIPTION="Port of the asyncio project to Python 2.7 (deprecated)"
+HOMEPAGE="https://github.com/vstinner/trollius https://pypi.org/project/trollius/"
+SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~x86 ~amd64-linux ~x86-linux"
+
+RDEPEND="virtual/python-futures[${PYTHON_USEDEP}]"
+DEPEND="${RDEPEND}
+	dev-python/setuptools[${PYTHON_USEDEP}]"
+
+python_test() {
+	"${PYTHON}" runtests.py -v 2 || die "Testing failed under ${EPYTHON}"
+}