Bump eslint-plugin-ember from 7.0.0 to 7.7.2

Bumps [eslint-plugin-ember](https://github.com/ember-cli/eslint-plugin-ember) from 7.0.0 to 7.7.2.
- [Release notes](https://github.com/ember-cli/eslint-plugin-ember/releases)
- [Changelog](https://github.com/ember-cli/eslint-plugin-ember/blob/master/CHANGELOG.md)
- [Commits](ember-cli/eslint-plugin-ember@v7.0.0...v7.7.2)

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

Author: dependabot-preview[bot]

Diff for: package-lock.json

@@ -77,7 +77,7 @@
     "emberx-select": "^3.1.1",
     "eslint": "^6.3.0",
     "eslint-config-prettier": "^6.2.0",
-    "eslint-plugin-ember": "^7.0.0",
+    "eslint-plugin-ember": "^7.7.2",
     "eslint-plugin-prettier": "^3.1.0",
     "loader.js": "^4.5.1",
     "normalize.css": "^7.0.0",