Update dependency eslint-config-prettier to v7 (#2296)

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

ember/package.json

@@ -89,7 +89,7 @@
     "ember-truth-helpers": "2.1.0",
     "ember-web-app": "5.0.1",
     "eslint": "7.16.0",
-    "eslint-config-prettier": "6.15.0",
+    "eslint-config-prettier": "7.1.0",
     "eslint-config-simplabs": "0.4.0",
     "eslint-plugin-ember": "10.0.2",
     "eslint-plugin-import-helpers": "1.1.0",

ember/yarn.lock

@@ -7372,12 +7372,10 @@ escodegen@^1.11.0, escodegen@^1.14.1:
   optionalDependencies:
     source-map "~0.6.1"
 
-[email protected]:
-  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"
+[email protected]:
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-7.1.0.tgz#5402eb559aa94b894effd6bddfa0b1ca051c858f"
+  integrity sha512-9sm5/PxaFG7qNJvJzTROMM1Bk1ozXVTKI0buKOyb0Bsr1hrwi0H/TzxF/COtf1uxikIK8SwhX7K6zg78jAzbeA==
 
 [email protected]:
   version "0.4.0"
@@ -8465,11 +8463,6 @@ get-stdin@^4.0.1:
   resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-4.0.1.tgz#b968c6b0a04384324902e8bf1a5df32579a450fe"
   integrity sha1-uWjGsKBDhDJJAui/Gl3zJXmkUP4=
 
-get-stdin@^6.0.0:
-  version "6.0.0"
-  resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-6.0.0.tgz#9e09bf712b360ab9225e812048f71fde9c89657b"
-  integrity sha512-jp4tHawyV7+fkkSKyvjuLZswblUtz+SQKzSWnBbii16BuZksJlU1wuBYXY75r+duh/llF1ur6oNwi+2ZzjKZ7g==
-
 get-stdin@^8.0.0:
   version "8.0.0"
   resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-8.0.0.tgz#cbad6a73feb75f6eeb22ba9e01f89aa28aa97a53"