dev-python/injector: add 0.21.0-r1, drop 0.21.0

* Improve ebuild

Signed-off-by: Gonçalo Negrier Duarte <gonegrier.duarte@gmail.com>

dev-python/injector/injector-0.21.0-r1.ebuild

@@ -0,0 +1,26 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+DISTUTILS_USE_PEP517=setuptools
+PYTHON_COMPAT=( python3_{9..12} )
+
+inherit distutils-r1
+
+DESCRIPTION="Python dependency injection framework, inspired by Guice"
+HOMEPAGE="https://github.com/python-injector/injector"
+SRC_URI="
+	https://github.com/python-injector/${PN}/archive/refs/tags/${PV}.tar.gz
+		-> ${P}.gh.tar.gz"
+
+SLOT="0"
+LICENSE="BSD"
+KEYWORDS="~amd64 ~x86 ~x86-linux"
+
+distutils_enable_sphinx docs
+distutils_enable_tests pytest
+
+python_install_all() {
+	distutils-r1_python_install_all
+}