chore: fix test

Author: antfu

package.json

@@ -36,6 +36,7 @@
   "devDependencies": {
     "@antfu/eslint-config": "^0.5.1",
     "@types/debug": "^4.1.5",
+    "@types/jest": "^26.0.20",
     "@types/minimatch": "^3.0.3",
     "@types/node": "^14.14.34",
     "@typescript-eslint/eslint-plugin": "^4.17.0",