Fixes made by blueimp

[eeroan]

This PR contains:

• [x] bugfix
• [ ] feature
• [ ] refactor
• [ ] tests
• [ ] documentation
• [x] metadata

Breaking Changes?

• [ ] yes
• [x] no

If yes, please describe the breakage.

Please Describe Your Changes

• Fix incorrect mocha option colors to color
• Define mocha >=7 as peer dependency

[shellscape]

I'm not sure what's going on here with the multiple contributors on the PR branch, but there's a lot not done correctly. The changes to the flags are breaking changes, which means a new major version. And that's not something that needs to happen. The user-facing flags don't need to change, and they can be passed to the internal mocha object with the correct name, without breaking for users.