Update dependency jest to v26

Author: renovate-bot

package.json

@@ -18,7 +18,7 @@
     "better-sqlite3": "^5.4.3",
     "eslint": "^5.16.0",
     "eslint-config-bliss": "^3.4.0",
-    "jest": "^23.6.0",
+    "jest": "^26.4.2",
     "sqlite3": "^4.1.0"
   },
   "eslintConfig": {