0.9.0

• Fixed intend in hydrator.md #471
• Allow symfony 3.0 #477
• Removed Travis build for 5.3 and added builds for 5.6 and 7.0 #491
• Fixed documentation for Example 4 #486
• Update year of license #488
• Standardize array configuration #489
• Fix #467 bypass value to validate message #479
• Adding doctrine/coding-standard to builds #478
• update hydrator s documentation url to current #493
• Added PredisCache support #492
• adding functionality to support custom attributes on value-options #446
• FormElement s options can be set individual #452
• Update module.config.php #498
• Implemented Optgroup functionality within Proxy element #502
• Removed check to allow zero-identifiers. #459
• Refactored tests for option_attributes #505
• Bump phpunit minimum version #512