Bump prettier from 2.1.1 to 2.2.1 (#297)

Bumps [prettier](https://github.com/prettier/prettier) from 2.1.1 to 2.2.1.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@2.1.1...2.2.1)

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

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

package.json

@@ -35,7 +35,7 @@
     "lighthouse": "^6.3.0",
     "lighthouse-badges": "^1.0.34",
     "mocha": "^8.3.2",
-    "prettier": "2.1.1",
+    "prettier": "2.2.1",
     "start-server-and-test": "^1.11.3"
   },
   "keywords": [

yarn.lock

@@ -12301,10 +12301,10 @@ prepend-http@^2.0.0:
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-2.0.0.tgz#e92434bfa5ea8c19f41cdfd401d741a3c819d897"
   integrity sha1-6SQ0v6XqjBn0HN/UAddBo8gZ2Jc=
 
-prettier@2.1.1, prettier@^2.0.5:
-  version "2.1.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.1.1.tgz#d9485dd5e499daa6cb547023b87a6cf51bee37d6"
-  integrity sha512-9bY+5ZWCfqj3ghYBLxApy2zf6m+NJo5GzmLTpr9FsApsfjriNnS2dahWReHMi7qNPhhHl9SYHJs2cHZLgexNIw==
+prettier@2.2.1, prettier@^2.0.5:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.2.1.tgz#795a1a78dd52f073da0cd42b21f9c91381923ff5"
+  integrity sha512-PqyhM2yCjg/oKkFPtTGUojv7gnZAoG80ttl45O6x2Ug/rMJw4wcc9k6aaf2hibP7BGVCCM33gZoGjyvt9mm16Q==
 
 pretty-bytes@^5.1.0, pretty-bytes@^5.4.1:
   version "5.4.1"