2.0.4

• 6eefbc4 - Removes ext-sysvsem from composer as we now use LockableTrait which uses Flock or SemaphoreLock.
• f719a5b - Updates code standards to PSR-12
• f74d7ca - Fixed typo in install command.
• 1aed1be - Fixes #51 and provides a better example for deploy:prepare.