Update eslint-config-prettier requirement from ^4.2.0 to ^6.0.0 (#39)

Updates the requirements on [eslint-config-prettier](/~https://github.com/prettier/eslint-config-prettier) to permit the latest version.
- [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@v4.2.0...v6.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -46,7 +46,7 @@
   },
   "dependencies": {
     "eslint-config-airbnb-base": "^13.2.0",
-    "eslint-config-prettier": "^4.2.0"
+    "eslint-config-prettier": "^6.0.0"
   },
   "peerDependencies": {
     "eslint": "^5.16.0",