Bump eslint-config-prettier from 6.11.0 to 6.15.0

Bumps [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) from 6.11.0 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@v6.11.0...v6.15.0)

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

Author: dependabot-preview[bot]

package.json

@@ -55,7 +55,7 @@
     "ember-template-lint": "^2.14.0",
     "ember-try": "^1.4.0",
     "eslint": "^7.3.1",
-    "eslint-config-prettier": "^6.7.0",
+    "eslint-config-prettier": "^6.15.0",
     "eslint-plugin-ember": "^7.7.1",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prettier": "^3.1.4",

yarn.lock

@@ -5660,10 +5660,10 @@ escodegen@^1.11.0:
   optionalDependencies:
     source-map "~0.6.1"
 
-eslint-config-prettier@^6.7.0:
-  version "6.11.0"
-  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-6.11.0.tgz#f6d2238c1290d01c859a8b5c1f7d352a0b0da8b1"
-  integrity sha512-oB8cpLWSAjOVFEJhhyMZh6NOEOtBVziaqdDQ86+qhDHFbZXoRTM7pNSvFRfW/W/L/LrQ38C99J5CGuRBBzBsdA==
+eslint-config-prettier@^6.15.0:
+  version "6.15.0"
+  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-6.15.0.tgz#7f93f6cb7d45a92f1537a70ecc06366e1ac6fed9"
+  integrity sha512-a1+kOYLR8wMGustcgAjdydMsQ2A/2ipRPwRKUmfYaSxc9ZPcrku080Ctl6zrZzZNs/U82MjSv+qKREkoq3bJaw==
   dependencies:
     get-stdin "^6.0.0"