- Update to support axum 0.2 [#303](https://github.com/lambda-fairy/maud/pull/303) - Add support for `Option<T>` attributes using the `attr=[value]` syntax. [#306](https://github.com/lambda-fairy/maud/pull/306) - Update to Rust 2021 [#309](https://github.com/lambda-fairy/maud/pull/309) - Remove Iron support [#289](https://github.com/lambda-fairy/maud/pull/289) - Disallow slashes (`/`) in void elements [#315](https://github.com/lambda-fairy/maud/pull/315)