Set up code coverage analysis
It would be nice to have code coverage reports based on runs of librsvg's test suite. I'd be OK with using an external pretty-printing service like coveralls (e.g. see the output for rav1e). I don't know if the state of the art for Rust is cargo-tarpaulin or cargo-kcov or something else. See Rust Code Coverage Tools.
Edited by Federico Mena Quintero