[FEATURE] Use local config files when using dry-run mode

[Badisi]

I'll mark this one as a feature but I really think it should be considered a bug.

Issue

I was trying to diagnose my release-please setup using the dry-run mode:

npx release-please release-pr --token=XYZ --repo-url=XYZ --debug --dry-run

The thing is, I've spent hours trying to understand why it was not reflecting the modifications I was making in my local release-please-config.json and .release-please-manifest.json.

I even try specifying the files in the command itself... and that's when I realized that the actual files that are used are the ones on the repository and not the ones in my local project. Which feels completely not intuitive for a dry run.

Feature request

Make use of the local config files when using the dry-run mode.