Static analysis tools/quality assurance tools

[alice]

In Tokio, we use the following tools:

• cargo check or cargo test on many different platforms
• rustfmt
• clippy
• loom for parallel tests
• --feature-powerset from cargo hack
• cargo update -Z minimal-versions to test that the oldest allowed version of each dependency has everything we need
• We run cargo check on our MSRV.
• Various sanitizers: valgrind, asan, miri
• cargo-semver-checks
• cargo-check-external-types
• audit checker for RustSec and cargo audit
• We run fuzz tests in Google's OSS-fuzz program