Update dependency prettier to v2.8.7 (#173)

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

Author: renovate[bot]

package.json

@@ -59,7 +59,7 @@
     "karma-firefox-launcher": "2.1.2",
     "karma-jasmine": "5.1.0",
     "pinst": "3.0.0",
-    "prettier": "2.8.6",
+    "prettier": "2.8.7",
     "pretty-quick": "3.1.3",
     "release-it": "15.9.1",
     "release-it-plugin-esm-bundle": "3.0.0",