Bump idna from 0.2.1 to 0.2.2 (#907)
Bump idna from 0.2.1 to 0.2.2 (#907)

Bumps [idna](https://github.com/servo/rust-url) from 0.2.1 to 0.2.2.
- [Release notes](https://github.com/servo/rust-url/releases)
- [Commits](https://github.com/servo/rust-url/compare/v0.2.1...idna-v0.2.2)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
alex/ct-tools,alex/ct-tools