⬆️ Update testing requirement from 0.33 to 0.34

Updates the requirements on [testing](https://github.com/swc-project/swc) to permit the latest version.
- [Release notes](https://github.com/swc-project/swc/releases)
- [Changelog](https://github.com/swc-project/swc/blob/main/CHANGELOG.md)
- [Commits](https://github.com/swc-project/swc/commits)

---
updated-dependencies:
- dependency-name: testing
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -14,7 +14,7 @@ categories = ["text-processing", "parsing"]
 markdown-it =  { version = "0.6", default-features = false }
 regex       = ">= 1.0.0, < 2"
 once_cell   = ">= 1.0.1, < 2"
-testing     = "0.33"
+testing     = "0.34"
 rstest      = "0.17"
 # possible other packages for testing that are not actually used currently
 # indoc, rtest, insta