chore(deps): update dependency @types/jest to v26.0.20

Author: renovate-bot

package-lock.json

@@ -31,7 +31,7 @@
     "@actions/github": "4.0.0"
   },
   "devDependencies": {
-    "@types/jest": "26.0.19",
+    "@types/jest": "26.0.20",
     "@types/node": "14.14.20",
     "@vercel/ncc": "0.26.2",
     "dotenv": "8.2.0",