chore: Add ESLint no-floating-promise

client/configuration/eslint/eslint.js

@@ -82,13 +82,14 @@ module.exports = {
       },
       // Can't extend in overrides: https://github.com/eslint/eslint/issues/8813
       // "extends": ["plugin:jest/recommended"]
-      plugins: ["jest"],
+      plugins: ["jest", "no-floating-promise"],
       rules: {
         "jest/no-disabled-tests": "warn",
         "jest/no-focused-tests": "error",
         "jest/no-identical-title": "error",
         "jest/prefer-to-have-length": "warn",
         "jest/valid-expect": "error",
+        "no-floating-promise/no-floating-promise": 2,
       },
     },
   ],