Patch: Update config.toml

[lizatkinson]

Above configuration file uses the -Wall, -Wextra, and -Wpedantic flags to enable all available warning messages, and the -Wfuture-incompatible, -Wnonstandard-style, and -Wunused flags to enable specific warnings for code that may become incompatible with future versions of Rust, code that deviates from standard Rust style guidelines, and unused code elements, respectively. Finally, the -Dclippy::unwrap_used flag enables warnings for the use of the unwrap() method.

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This change is 

[dan-starkware]

Thanks for the PR! I apologize for not getting back to you sooner.

I think we should stick to deny rather than warn.

As for the new lints, I think that:

• all - means all lints that are on by default, so it shouldn't add coverage, right?
• extra - I'm not familiar with it, can you please give a reference to a corresponding documentation?
• pedantic - this is a Clippy lint group/category (so should probably be clippy::pedantic)

Reviewed 1 of 1 files at r1.
Reviewable status: all files reviewed (commit messages unreviewed), all discussions resolved (waiting on @lizatkinson)