Update find-crate to 0.7

[musicinmybrain]

A quick manual review of how find-crate is used in this project against https://github.com/taiki-e/find-crate/blob/v0.7.1/CHANGELOG.md suggested that nothing should need changing, and cargo test --workspace still passes.

[TechnoPorg]

Thanks! I will be doing more work on the library in the next few days/weeks, so I will hold off on a point release of this for now.