Add py-pkginfo package (#13448)

var/spack/repos/builtin/packages/py-pkginfo/package.py

+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class PyPkginfo(PythonPackage):
+    """Query metadatdata from sdists / bdists / installed packages."""
+
+    homepage = "https://code.launchpad.net/~tseaver/pkginfo/trunk"
+    url      = "https://pypi.io/packages/source/p/pkginfo/pkginfo-1.5.0.1.tar.gz"
+
+    version('1.5.0.1', sha256='7424f2c8511c186cd5424bbf31045b77435b37a8d604990b79d4e70d741148bb')
+
+    depends_on('py-setuptools', type='build')
+    depends_on('py-nose', type='test')
+    depends_on('py-coverage', type='test')