Fix ReflectionExtension::getVersion (nikic#141)

Release php-ast 1.0.4 (nikic#139)

* Release php-ast 1.0.4

* Update date, add me as <developer> in package.xml

Release version 1.0.3

Release version 1.0.2

Release version 1.0.1

Release version 1.0.0

Release version 0.1.7

Release version 0.1.6

Release version 0.1.5

Release version 0.1.4

With fix for handling of nullable types