Improve `update` behavior when git dependency changes in config

[beeb]

I have checked the following:

• I have searched the issues of this repository and believe that this is not a duplicate.

Problem

At the moment, the soldeer update command does not update the lockfile for custom URL dependencies, even if the tag, rev or URL have changed in the config file (git tag case is confirmed, other to be confirmed still). This leads to confusion when trying to update a dependency by manually editing the config file.

Solution

The soldeer update command should ignore the lockfile entry if the config has changed in a way that should invalidate the lock entry.

Additional Context

No response