Support version segment placeholder in the sdk constraint

[shilangyu]

Actions often provide the possibility of specifying the version with a x placeholder for the tool to pick the newest available version.

For example, if the sdk was specified as following:

with:
    sdk: 2.16.x

This action would grab 2.16.2 (which as of posting this issue is the newest patch release for 2.16). Currently this results in an error. This would be very useful for patch versions, as there is often no incentive to stick to a particular patch version. Instead, I would like the patches to be applied automatically.