dev-python/packaging: Bump to 21.3

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

dev-python/packaging/Manifest

@@ -1 +1,2 @@
 DIST packaging-21.0.gh.tar.gz 79977 BLAKE2B 4ddfa5069f463abeab09ed92650a174d58622927d24b22eed184506d36d9144520e90cd5ea6570e7c06af3c768eda608decc4befb402942e6d6cd1ba5cb10b42 SHA512 612744ad8d0b834709af5d4e2415679271e4cdc304a2e9297ec741e37e62241a041b678568130cd733828a1bf2e5885d62de706934f4018195566107989a6f6b
+DIST packaging-21.3.gh.tar.gz 80471 BLAKE2B a16ba1e74f0c868816131a7cb07b7aa0c14760cf3ad4c3d6737ac30ef99276c33b1f018d29e710f28e8d0cfb0e3e6b91e375d1d17e2b7ec6302164377cd503d0 SHA512 8960deacda26877b73d98a3b632e760e902a16ec7a04707f84044980e4d4fb33e4f584db115c9008066aa876079f28633bafe37fbd5ce9a23830b6b89eb4ae7a

dev-python/packaging/packaging-21.3.ebuild

@@ -0,0 +1,34 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# please keep this ebuild at EAPI 7 -- sys-apps/portage dep
+EAPI=7
+
+PYTHON_COMPAT=( python3_{8..10} pypy3  )
+inherit distutils-r1
+
+DESCRIPTION="Core utilities for Python packages"
+HOMEPAGE="
+	https://github.com/pypa/packaging/
+	https://pypi.org/project/packaging/"
+SRC_URI="
+	https://github.com/pypa/packaging/archive/${PV}.tar.gz -> ${P}.gh.tar.gz"
+
+SLOT="0"
+LICENSE="|| ( Apache-2.0 BSD-2 )"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+
+RDEPEND="
+	>=dev-python/pyparsing-3.0.6[${PYTHON_USEDEP}]
+"
+DEPEND="
+	test? (
+		dev-python/pretend[${PYTHON_USEDEP}]
+	)
+"
+
+distutils_enable_tests pytest
+
+python_test() {
+	epytest --capture=no
+}