Update dependency prettier to v2.7.1

Author: renovate[bot]

package-lock.json

@@ -46,7 +46,7 @@
     "husky": "7.0.4",
     "lit": "2.0.2",
     "npm-run-all": "4.1.5",
-    "prettier": "2.4.1",
+    "prettier": "2.7.1",
     "pretty-quick": "3.1.1",
     "snowpack": "3.8.8",
     "typescript": "4.4.4"