Bump prettyplease from 0.2.30 to 0.2.31 (#1294)

Bumps [prettyplease](https://github.com/dtolnay/prettyplease) from 0.2.30 to 0.2.31.
- [Release notes](https://github.com/dtolnay/prettyplease/releases)
- [Commits](dtolnay/prettyplease@0.2.30...0.2.31)

---
updated-dependencies:
- dependency-name: prettyplease
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -30,5 +30,5 @@ features = [ "full", "visit", "extra-traits" ]
 
 [dev-dependencies]
 expectorate = "1.1.0"
-prettyplease = "0.2.30"
+prettyplease = "0.2.31"
 schema = "0.1.0"