Bump eslint-plugin-prettier from 3.4.1 to 4.2.1 (#310)

Bumps [eslint-plugin-prettier](https://github.com/prettier/eslint-plugin-prettier) from 3.4.1 to 4.2.1.
- [Release notes](https://github.com/prettier/eslint-plugin-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-plugin-prettier/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prettier/eslint-plugin-prettier/commits/v4.2.1)

---
updated-dependencies:
- dependency-name: eslint-plugin-prettier
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -16,7 +16,7 @@
     "eslint": "^7.25.0",
     "eslint-config-prettier": "^8.3.0",
     "eslint-config-react-app": "^7.0.1",
-    "eslint-plugin-prettier": "^3.1.2",
+    "eslint-plugin-prettier": "^4.2.1",
     "jest-fetch-mock": "^3.0.3",
     "prettier": "^2.2.0",
     "ra-test": "^3.15.0"

yarn.lock

@@ -5204,10 +5204,10 @@ eslint-plugin-jsx-a11y@^6.5.1:
     minimatch "^3.1.2"
     semver "^6.3.0"
 
-eslint-plugin-prettier@^3.1.2:
-  version "3.4.1"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-3.4.1.tgz#e9ddb200efb6f3d05ffe83b1665a716af4a387e5"
-  integrity sha512-htg25EUYUeIhKHXjOinK4BgCcDwtLHjqaxCDsMy5nbnUMkKFvIhMVCp+5GFUXQ4Nr8lBsPqtGAqBenbpFqAA2g==
+eslint-plugin-prettier@^4.2.1:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-4.2.1.tgz#651cbb88b1dab98bfd42f017a12fa6b2d993f94b"
+  integrity sha512-f/0rXLXUt0oFYs8ra4w49wYZBG5GKZpAYsJSm6rnYL5uVDjd+zowwMwVZHnAjf4edNrKpCDYfXDgmRE/Ak7QyQ==
   dependencies:
     prettier-linter-helpers "^1.0.0"