Bump diffy from 3.2.0 to 3.4.2

Bumps [diffy](https://github.com/samg/diffy) from 3.2.0 to 3.4.2.
- [Release notes](https://github.com/samg/diffy/releases)
- [Changelog](https://github.com/samg/diffy/blob/main/CHANGELOG)
- [Commits](https://github.com/samg/diffy/commits)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -16,7 +16,7 @@ GEM
     ast (2.3.0)
     coderay (1.1.1)
     diff-lcs (1.3)
-    diffy (3.2.0)
+    diffy (3.4.2)
     docile (1.1.5)
     facter (2.4.6)
     faraday (0.13.1)