* Use appDescription in composer.mustache
* Update petstore files
* More updated php petstore files
* Yet another updated php petstore file
* Use "{{{appDescription}}}" instead of "{{appDescription}}"
* Delete unused IF statement
JSON_PRETTY_PRINT is available since PHP 5.4.0
* Update samples
- bin/php-petstore.sh
- bin/security/php-petstore.sh
- bin/openapi3/php-petstore.sh