dev dependency prettier updated to version 2.8.8

Author: renovate[bot]

package.json

@@ -35,7 +35,7 @@
     "eslint-plugin-import": "2.27.5",
     "eslint-plugin-prettier": "3.4.1",
     "@sinonjs/fake-timers": "6.0.1",
-    "prettier": "2.8.7",
+    "prettier": "2.8.8",
     "tap": "14.11.0"
   },
   "repository": {