v1.2.2
Work around an unfortunate ICE https://github.com/rust-lang/rust/issues/37274 <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/rust-url/233) <!-- Reviewable:end -->