Refactor: Lint test/client (#1602)

* lint test/client

.eslintrc.js

@@ -81,6 +81,13 @@ module.exports = {
         'max-nested-callbacks': 'off',
       },
     },
+    {
+      files: ['test/client/*.ts'],
+      rules: {
+        // Rule does not work with dynamically generated tests.
+        'mocha/no-setup-in-describe': 'off',
+      },
+    },
     {
       files: ['test/models/*.ts'],
       rules: {