sphinxcontrib-mermaid: new package at v0.4.0 (#17630)

var/spack/repos/builtin/packages/py-sphinxcontrib-mermaid/package.py

+# Copyright 2013-2020 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 PySphinxcontribMermaid(PythonPackage):
+    """This extension allows you to embed
+    `Mermaid <http://knsv.github.io/mermaid/>`_ graphs in your documents,
+    including general flowcharts, sequence and gantt diagrams."""
+
+    homepage = "https://github.com/mgaitan/sphinxcontrib-mermaid"
+    url = "https://files.pythonhosted.org/packages/8e/0a/8a97b65608a63c43a99a9d6a37a5baff853f306e8506bf21ce54bb50d4f3/sphinxcontrib-mermaid-0.4.0.tar.gz"
+
+    version('0.4.0', sha256='0ee45ba45b9575505eacdd6212e4e545213f4f93dfa32c7eeca32720dbc3b468') 
+    version('0.3.1', sha256='649738afc3022d25a742a928f7b4146cf6024b1d8bb49017962713d2de78123c', extension='zip')
+
+    depends_on('py-sphinx@1.7:')