Update dependency prettier to ~2.6.0 (#407)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package-lock.json

@@ -77,7 +77,7 @@
         "mocha": "^9.1.2",
         "mocha-chai-jest-snapshot": "^1.1.3",
         "nyc": "^15.1.0",
-        "prettier": "~2.5.0",
+        "prettier": "~2.6.0",
         "raw-loader": "^4.0.2",
         "stylelint": "^14.0.0",
         "stylelint-config-standard": "^25.0.0",