Fix break by stable composer requirement for Base

Change composer.json Base requirement back to "*"

The recent change of composer.json broke use of @\dev package for Base. Ideally a dev components package should allow other components dev packages for testing, and stable requirements should rather be the case for tags / stable branches.

ping @derickr @beberlei
Can, but this allows stable packages so more flexible.
It should probably be like this:
https://github.com/zetacomponents/Feed/commit/4951c15576316a13cacf5804c0c32de9dcfa0aca