Replace strings nicely

[justinrubek]

The current implementation is a quick and dirty regex lookup. As a result some care has to be taken with package names. For example, if a short (and common) pattern like "cli" is given then a Cargo.lock might have multiple crates that could be matched and incorrectly replaced.

My strategy this far has been to carefully name packages and manually ensure that dependencies don't get bumped. This isn't ideal and I think it'd be a good idea to try to add support for different types of files. In the config there could be a replacement-type with values such as cargo-toml, cargo-lock, and regex.

• Cargo Improve cargo support #3
• Yarn
• Others

[justinrubek]

Should there be a top-level configuration value for all of these? cargo is currently at the top-level of configuration, but I think it may be a good idea to change the configuration to something like this: ( replacers: [ cargo: ... ])