kriswallsmith/assetic — comment on commit 0c7158ac6c480eb1dcc9f1c4b5795680d49e2577
File: composer.json line 17
By stof:

yeah, but for branches, the version is suffixed by ``-dev`` and 2.1.0-dev < 2.1.0

So you should either use ``>=2.1.0-dev`` (which includes all revisions including Symfony 4.5.1 so it would be better to had another constraint for the upper bound) or ``2.1.*`` (which is equivalent to ``>=2.1.0-dev,<2.2-dev``)