Update dependency prettier to v2.8.8

Author: renovate[bot]

Diff for: package.json

@@ -48,7 +48,7 @@
     "@types/tap": "14.10.2",
     "np": "https://github.com/pixelastic/np/tarball/c3ab2e3b053c7da0ce40a572ca1616273ac080f8",
     "npm-run-all": "4.1.5",
-    "prettier": "2.2.1",
+    "prettier": "2.8.8",
     "rimraf": "3.0.2",
     "rollup": "2.38.5",
     "tap": "14.11.0",