Update dependency prettier to v2.8.0

Author: renovate[bot]

package-lock.json

@@ -191,7 +191,7 @@
     "ncp": "2.0.0",
     "node-abi": "^3.8.0",
     "npm-run-all": "4.1.5",
-    "prettier": "2.2.1",
+    "prettier": "2.8.0",
     "pretty-quick": "^3.1.0",
     "run-script-os": "^1.1.6",
     "ts-jest": "25.3.0",