Update dependency @types/jest to v26.0.15

Author: renovate-bot

package-lock.json

@@ -36,7 +36,7 @@
   "devDependencies": {
     "@types/bcryptjs": "2.4.2",
     "@types/chance": "1.1.0",
-    "@types/jest": "26.0.14",
+    "@types/jest": "26.0.15",
     "@types/jsonwebtoken": "8.5.0",
     "@types/lodash": "4.14.162",
     "@types/node": "14.11.10",