- Merge "Deno.serve()" and "Deno.serveTls()" API
- Remove first argument and use "fetch" field options instead
- Update type declarations
- Add more documentation
RUSTFLAGS take precedence over `target.<triple>.rustflags`. Therefore,
setting the env var globally in CI would always override whatever linter
rules are allowed or denied in .cargo/config.toml.
With this change, we ensure that problems are detected both in CI and
locally, using either cargo clippy or lint.js.
