1.5.1

What's Changed

• fix #39 by @antoniosanct in #41
• code cleanup by @lukasj in #44
• replace obsolete code by modern one by @lukasj in #45
• #40: Occurrence constants are misspelled by @lukasj in #46

New Contributors

• @antoniosanct made their first contribution in #41

Full Changelog: 1.5.0...1.5.1