Update runtime and buildtime dependencies

- mock is not used at all
- xapian is an optional test dependency (like sqlalchemy and whoosh)
- six is only used in tests

python-sphinxcontrib-websupport.spec

@@ -2,7 +2,7 @@
 
 Name:           python-%{pypi_name}
 Version:        1.2.4
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Sphinx API for Web Apps
 
 License:        BSD
@@ -20,17 +20,21 @@ Summary:        %{summary}
 BuildRequires:  python3-devel
 BuildRequires:  python3-setuptools
 BuildRequires:  python3-jinja2
-BuildRequires:  python3-mock
 BuildRequires:  python3-pytest
 BuildRequires:  python3-six
 BuildRequires:  python3-sphinx
 BuildRequires:  python3-sphinxcontrib-serializinghtml >= 1.1.3
+
+# Optional tests deps:
 BuildRequires:  python3-sqlalchemy
 BuildRequires:  python3-whoosh
+BuildRequires:  python3-xapian
+
+# Undeclared but used runtime dependencies
+# https://github.com/sphinx-doc/sphinxcontrib-websupport/pull/46
 Requires:       python3-jinja2
-Requires:       python3-six
 Requires:       python3-sphinx
-Requires:       python3-sphinxcontrib-serializinghtml >= 1.1.3
+
 Recommends:     python3-sqlalchemy
 Recommends:     python3-whoosh
 
@@ -65,6 +69,9 @@ rmdir empty
 %{python3_sitelib}/sphinxcontrib_websupport-*.egg-info/
 
 %changelog
+* Wed Mar 10 2021 Miro Hrončok <mhroncok@redhat.com> - 1.2.4-3
+- Update runtime and buildtime dependencies
+
 * Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.2.4-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild