Breaking API change introduced in v0.4.6

[rbost]

The refactoring of commit 897baa9 created a new module (find) hosting the functions find_unsafe_in_file and find_unsafe_in_string of the geiger crate. As these functions are not re-exported in lib.rs, it changes the call path and requires changing imports (or the calls themselves) in dependent code.

Note that this can be easily identified by comparing the documentation of v0.4.5 with the one of v0.4.6 on docs.rs.

I found this issue when installing cargo-crev which uses this crate.
The fix is a one-liner; I will submit it ASAP.