Bump color-string from 1.5.3 to 1.5.5 in /coding-exercise

Bumps [color-string](https://github.com/Qix-/color-string) from 1.5.3 to 1.5.5.
- [Release notes](https://github.com/Qix-/color-string/releases)
- [Changelog](https://github.com/Qix-/color-string/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Qix-/color-string/commits/1.5.5)

---
updated-dependencies:
- dependency-name: color-string
  dependency-type: indirect
...

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

Author: dependabot[bot]

coding-exercise/yarn.lock

@@ -2550,8 +2550,8 @@ color-name@^1.0.0, color-name@~1.1.4:
   resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
 
 color-string@^1.5.2:
-  version "1.5.3"
-  resolved "https://registry.yarnpkg.com/color-string/-/color-string-1.5.3.tgz#c9bbc5f01b58b5492f3d6857459cb6590ce204cc"
+  version "1.5.5"
+  resolved "https://registry.yarnpkg.com/color-string/-/color-string-1.5.5.tgz#65474a8f0e7439625f3d27a6a19d89fc45223014"
   dependencies:
     color-name "^1.0.0"
     simple-swizzle "^0.2.2"