Infrastructure: Bump eslint-config-prettier package from 6.14.0 to 6.…

…15.0 (pull #1591)

Bumps [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) from 6.14.0 to 6.15.0.
- [Release notes](https://github.com/prettier/eslint-config-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-config-prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/eslint-config-prettier@v6.14.0...v6.15.0)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -34,7 +34,7 @@
     "cheerio": "^1.0.0-rc.2",
     "cspell": "^4.1.3",
     "eslint": "^7.11.0",
-    "eslint-config-prettier": "^6.14.0",
+    "eslint-config-prettier": "^6.15.0",
     "eslint-plugin-ava": "^11.0.0",
     "eslint-plugin-prettier": "^3.1.4",
     "geckodriver": "^1.20.0",