v2.6

Frozen version for PHP 5.3

v3.2

• Add support for PostgreSQL

v3.1

• Fix required entity option
• Small CS fixes and refactoring

v3.0

• Refactoring
• PSR-4
• Fix tests for phpunit v4

v2.5

• Small refactoring

v2.4

• Support SQLite for functional testing purposes

v2.3

• Support for NULL values
• EnumTypeGuesser process only children of AbstractEnumType