chore(deps): update dependency jest to v26

Author: renovate-bot

package.json

@@ -67,7 +67,7 @@
     "eslint-plugin-node": "11.1.0",
     "eslint-plugin-promise": "4.2.1",
     "http-server": "0.12.3",
-    "jest": "25.5.4",
+    "jest": "26.2.2",
     "mock-socket": "9.0.3",
     "prettier": "2.0.5",
     "ts-jest": "26.1.4",