1.7.3

#111 Add Psalm annotations

1.7.2

Fixed #95 with #97: handle inherited enums

1.7.1

• Compatibility with PHP 7.1
• #90 New PHPUnit comparator to help with tests

1.7.0

• #88: require PHP 7.2 + add a return type to the equals() method
• #87: the equals() method now accepts anything as a parameter
• #86: compatibility with php-ds/ext-ds

1.6.6

#84 Require ext-json explicitly in composer.json to avoid bugs when the JSON extension is not installed

1.6.5

#83: It is now possible to create a new Enum instance from another Enum instance

1.6.4

#80 Fix validating key with null value
#82 Fix coding style and setup https://prettyci.com

1.6.3

Fix #77 #78: better support for null values in enums.

1.6.2

#75 Performance optimizations

1.6.1

#71 Allow null in the equals() method