fix lint error

Author: ota-meshi

.eslintrc.js

@@ -93,6 +93,12 @@ module.exports = {
       files: ["src/rules/**"],
       rules: {},
     },
+    {
+      files: ["tests/**"],
+      rules: {
+        "@typescript-eslint/no-misused-promises": "off",
+      },
+    },
     {
       files: ["scripts/**/*.ts", "tests/**/*.ts"],
       parser: "@typescript-eslint/parser",