[lwshang]

Problem

docs.rs hasn't been able to build docs for ic-certification since 3.0.3 (https://docs.rs/crate/ic-certification/latest). The build fails with:

error[E0557]: feature has been removed
 --> src/lib.rs:4:38
  |
4 | #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
  |                                      ^^^^^^^^^^^^ feature has been removed
  = note: removed in 1.92.0; see <https://github.com/rust-lang/rust/pull/138907>
  = note: merged into `doc_cfg`

Fix

• Remove doc_auto_cfg and keep feature(doc_cfg). doc_cfg now includes the auto-cfg behaviour, so the feature-gate labels in the docs stay.
• Release 4.0.1, bumping the same files the 4.0.0 release bumped (.cz.yaml, Cargo.toml, Cargo.lock, the JS package.json files) and adding a CHANGELOG entry. docs.rs builds each published version only once, so a new version is needed to get working docs.

Verified locally: RUSTDOCFLAGS="--cfg docsrs" cargo +nightly doc -p ic-certification --all-features --no-deps succeeds.

After merging, tag the merge commit:

git tag 4.0.1
git push origin 4.0.1

🤖 Generated with Claude Code