Add missing eslint plugin

packages/app/package.json

@@ -51,6 +51,7 @@
     "@testing-library/cypress": "^6.0.0",
     "@types/jquery": "^3.3.34",
     "cypress": "^4.2.0",
+    "eslint-plugin-cypress": "^2.10.3",
     "start-server-and-test": "^1.10.11"
   }
 }

yarn.lock

@@ -7854,6 +7854,13 @@ eslint-module-utils@^2.4.1:
     debug "^2.6.9"
     pkg-dir "^2.0.0"
 
+eslint-plugin-cypress@^2.10.3:
+  version "2.10.3"
+  resolved "https://registry.npmjs.org/eslint-plugin-cypress/-/eslint-plugin-cypress-2.10.3.tgz#82eba7e014954149d590402eecd0d4e147cc7f14"
+  integrity sha512-CvFeoCquShfO8gHNIKA1VpUTz78WtknMebLemBd1lRbcmJNjwpqCqpQYUG/XVja8GjdX/e2TJXYa+EUBxehtUg==
+  dependencies:
+    globals "^11.12.0"
+
 eslint-plugin-flowtype@4.6.0:
   version "4.6.0"
   resolved "https://registry.npmjs.org/eslint-plugin-flowtype/-/eslint-plugin-flowtype-4.6.0.tgz#82b2bd6f21770e0e5deede0228e456cb35308451"
@@ -9217,7 +9224,7 @@ global@^4.3.2, global@^4.4.0:
     min-document "^2.19.0"
     process "^0.11.10"
 
-globals@^11.1.0:
+globals@^11.1.0, globals@^11.12.0:
   version "11.12.0"
   resolved "https://registry.npmjs.org/globals/-/globals-11.12.0.tgz#ab8795338868a0babd8525758018c2a7eb95c42e"
   integrity sha512-WOBp/EEGUiIsJSp7wcv/y6MO+lV9UoncWqxuFfm8eBwzWNgyfBd6Gz+IeKQ9jCmyhoH99g15M3T+QaVHFjizVA==