user/py3-packaging: fix dependencies, bump to 19.1

Depends on py3-attrs, py3-six, and py3-pyparsing which wasn't correctly
specified before.

user/py3-packaging/APKBUILD

@@ -4,32 +4,32 @@ pkgname=py3-packaging
 _pkgname=packaging
 _p="${_pkgname#?}"
 _p="${_pkgname%"$_p"}"
-pkgver=19.0
+pkgver=19.1
 pkgrel=0
 pkgdesc="Core utilities for Python packages"
 url="https://pypi.python.org/pypi/packaging"
 arch="noarch"
+# Certified net clean
 license="Apache-2.0 AND BSD-2-Clause"
-depends="python3"
+depends="python3 py3-attrs py3-pyparsing py3-six"
 makedepends="python3-dev"
-checkdepends="py3-pytest py3-pretend py3-pyparsing"
-source="$pkgname-$pkgver.tar.gz::https://files.pythonhosted.org/packages/source/$_p/$_pkgname/$_pkgname-$pkgver.tar.gz"
+checkdepends="py3-pytest py3-pretend"
+source="$pkgname-$pkgver.tar.gz::https://files.pythonhosted.org/packages/source/$_p/$_pkgname/$_pkgname-$pkgver.tar.gz
+	test-glibc.patch"
 builddir="$srcdir/$_pkgname-$pkgver"
 
 build() {
-	cd "$builddir"
 	python3 setup.py build
 }
 
 check() {
-	cd "$builddir/tests"
-	python3 -m pytest
+	PYTHONPATH="$builddir" pytest
 }
 
 package() {
-	cd "$builddir"
 	python3 setup.py install --prefix=/usr --root="$pkgdir"
 
 }
 
-sha512sums="aa55b6fbca764e7de2992e294b7be9dc90b25f88b64ba0cd2d1d93042402d4360b4c2cdc134a94b083da0c0bc83de8fa7185c0856bcc96fa25828c10a793fba7  py3-packaging-19.0.tar.gz"
+sha512sums="1dec7f49c325801eb85b11432f8a316d228bb1881a04ac546f5556d60f5fa33f8085d0e91bbd5abfeb30bfcb05ec0532ed75a977dc996e256b4dc8c27c10e79b  py3-packaging-19.1.tar.gz
+d67e8f3eae1b7571edf705ba532e1c9a6dc4c241cb01dfeda8addb587c2039114b0e21e73140369e4a30d0256a2073ac877737458cb95006029e7ce44d0bae93  test-glibc.patch"

user/py3-packaging/test-glibc.patch

+--- packaging-19.1/tests/test_tags.py	2019-07-20 01:03:21.000000000 -0400
++++ packaging-19.1/tests/test_tags.py	2019-08-06 09:08:16.490018542 -0400
+@@ -474,6 +474,7 @@ def test_glibc_version_string(version_st
+     assert tags._glibc_version_string() is None
+ 
+ 
++@pytest.mark.skip(reason="musl is not glibc")
+ def test_have_compatible_glibc(monkeypatch):
+     if platform.system() == "Linux":
+         # Assuming no one is running this test with a version of glibc released in