2.4.0

• added email address as a constraint to strings

2.3.2

• new tests

2.3.1

• bugfix

2.3.0

• object inheritance

2.2.0

• add boolean

2.1.0

• Add regex for strings

2.0.0

• Add enum for strings
• Add optional messages
• Set minimum php version to 7

1.4.2

• add callback validation to array

1.4.1

• add callback validation to array

1.4.0

• Added the ability to define nullable items