v2.5.2

What's Changed

• fix panic on xn--55555577 by @Byron in #940
• Update idna to 1.0.1 by @valenting in #945
• Revert "Reimplement idna on top of ICU4X" by @valenting in #946

This release reverts recent IDNA changes and the MSRV back to rust 1.56
The idna v1.0.1 crate now lives on the idna-v1x branch.

Full Changelog: v2.5.1...v2.5.2