* Use cargo-deny to check license compliance.
All licenses should be MPL-2.0 or weaker.
* Run cargo-deny check licenses in mach tidy
* fmt
* Fix inverted boolean
* Move cargo deny to tidy.py
* Add quotes around license in error message
* Integrate `cargo-deny` into tidy fully
* Fix script tests
---------
Co-authored-by: Martin Robinson <mrobinson@igalia.com>
