* Upd: Add Symfony 4 Compatibility
#SymfonyConHackday2017
* Upd: Configure visibility of services for SF4
* Updated composer to allow Symfony 4.0
* Updated composer to allow Symfony 4.0
* PropelBundle for Symfony 4
* Upd: Travis configuration
* Upd: PHP 5 not supported anymore by PHPUnit
* Upd: Removing old SF version + PHPUnit correction
* * Removed param that was removed in symfony/yaml afb873f
* Updated format of object dumping as deprecated tags using colon symfony/yaml 38d3087
* * Added commands to console.xml as symfony no longer auto registers bundle commands
* Updated two services to public
* * Removed deprecated getMock calls for new createMock calls.
* * Add stub for additional abstract method
* * Updated schema locator test
* reverted unnecessary changes to abstract command and schemal locator
* Added fixtures for schema testing.
* * Updated schema locator test
* reverted unnecessary changes to abstract command and schemal locator
* Added fixtures for schema testing.
* * Removed unnecessary default for services
* Updated readme to reflect symfony version support
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