4.0.0

What's Changed

• fixing undefined method has_key?'` when an array is as element given by @this-chris in #4
• Fix Operator Precedence Issue in isKey Method in newer ruby versions by @victor-fdez in #7
• Release 4.0.0 by @fungiboletus in #8

New Contributors

• @this-chris made their first contribution in #4
• @victor-fdez made their first contribution in #7
• @fungiboletus made their first contribution in #8

Full Changelog: 3.0.0...4.0.0