⬆️ Bump fastimage from 2.3.0 to 2.3.1

Bumps [fastimage](https://github.com/sdsykes/fastimage) from 2.3.0 to 2.3.1.
- [Changelog](https://github.com/sdsykes/fastimage/blob/master/CHANGELOG)
- [Commits](sdsykes/fastimage@v2.3.0...v2.3.1)

---
updated-dependencies:
- dependency-name: fastimage
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -15,7 +15,7 @@ GEM
     coderay (1.1.3)
     diff-lcs (1.5.1)
     docile (1.4.0)
-    fastimage (2.3.0)
+    fastimage (2.3.1)
     ffi (1.16.3)
     formatador (1.1.0)
     guard (2.18.1)