chore(deps): update dependency prettier to v2.8.0

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -21,7 +21,7 @@
     "codecov": "3.8.3",
     "file-url": "3.0.0",
     "nyc": "15.1.0",
-    "prettier": "2.7.1",
+    "prettier": "2.8.0",
     "proxyquire": "2.1.3",
     "tempy": "1.0.1"
   },