Test lowest dependencies
Make phpcr/phpcr dep higher

Since phpcr/phpcr-beta10, RepositoryFactoryInterface methods are no longer
static. Using <phpcr/phpcr-beta10 would produce a "Cannot make static
method PHPCR\RepositoryFactoryInterface::getRepository() non static in
class Jackalope\RepositoryFactoryDoctrineDBAL" error.
Reduce jobs