Bump fastimage from 2.3.1 to 2.4.0 (#1084)

Bumps [fastimage](https://github.com/sdsykes/fastimage) from 2.3.1 to 2.4.0.
- [Changelog](https://github.com/sdsykes/fastimage/blob/master/CHANGELOG)
- [Commits](sdsykes/fastimage@v2.3.1...2.4.0)

---
updated-dependencies:
- dependency-name: fastimage
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -66,7 +66,7 @@ GEM
     execjs (2.10.0)
     extras (0.3.0)
       forwardable-extended (~> 2.5)
-    fastimage (2.3.1)
+    fastimage (2.4.0)
     ffi (1.17.0)
     ffi (1.17.0-x86_64-linux-gnu)
     forwardable-extended (2.6.0)