WHAT are you trying to accomplish with this PR?

fixes #417

• Added wildcards to environment variables however depending on your shell you will probably need quotation marks around any wildcards like: theme --env="client-*" uplodate
• Added the ability to use multiple env flags like: theme --env=production --env=development upload

WHY are you choosing this approach?

To implement having several selected environments/clients loaded at one time I had to implement having the ability to load independent environments. This added the ability for multiple env flags which I think is a good feature to have as well.

HOW is this accomplished?

Changed how environments/theme clients are loaded to have a environment name matcher.

Anything that could go wrong?

Tests have been added for all situation for loading environment. This seems low risk

Checklist

• It is safe to simply rollback this change.
• I have 🎩'd these changes by using the commands I changed by hand