Update to 2.22

- Fixes: rhbz#2020936

Co-Authored-By: Miro Hrončok <miro@hroncok.cz>

python-pycparser.spec

@@ -2,7 +2,7 @@
 
 Name:           python-pycparser
 Summary:        C parser and AST generator written in Python
-Version:        2.20
+Version:        2.22
 Release:        %autorelease
 License:        BSD-3-Clause
 URL:            http://github.com/eliben/pycparser
@@ -23,7 +23,7 @@ BuildRequires:  python3-ply
 
 # for unit tests
 %if %{with tests}
-BuildRequires:  cpp
+BuildRequires:  gcc
 %endif
 
 %description
@@ -64,7 +64,7 @@ popd
 %check
 %pyproject_check_import
 %if %{with tests}
-%{python3} tests/all_tests.py
+%py3_test_envvars %{python3} -m unittest discover
 %endif
  
 %files -n python3-pycparser -f %{pyproject_files}