Fix failing tests from refactor which I really should've done before the release

src/ifcopenshell-python/test/test_rules.py

@@ -5,6 +5,7 @@ import glob
 import pytest
 import tabulate
 
+import ifcopenshell.validate
 import ifcopenshell.express.rule_executor
 
 
@@ -40,4 +41,4 @@ def test_file(filename):
 
 
 if __name__ == "__main__":
-    pytest.main(["-sx", __file__])
+    pytest.main(["-sx", __file__])