[D8] Config Export to PHP array

Update git URL.

Thank you for applying! I added the Git instructions for non-maintainer users. Reviewers will check the project and post comments to list what should be changed.

1. I don't understand the use case for this module, why do you need the config as PHP. Please add that to the project page.
2. I checked the module if there is a security issue with importing and executing config PHP, but it does only do the export so this should be safe.
3. The regular expression rewriting could fail with special config field values that contain "false," for example. Don't have a better idea, but there could be some PHP parsing library for rewriting this in a more robust way.

Otherwise looks good to me.

Thanks for your contribution, Oleksandr!

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