add support to PHP-Parser 3.1 for running on PHP >= 5.5 and for parsi…

…ng PHP 5.2 to PHP 7.2

RELEASE-1.2.1 raise dependencies constraints versions

RELEASE-1.2.0 allow symfony components 3

RELEASE-1.1.0 drop support to PHP 5.3

RELEASE-1.0.1 diagram:render:* commands does not allow filter feature

RELEASE-1.0.0 first stable release

RELEASE-1.0.0-RC2

RELEASE-1.0.0-RC1