Update dependency jest to v26 (#361)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package.json

@@ -21,7 +21,7 @@
     "eslint-plugin-import": "2.20.2",
     "eslint-plugin-prettier": "3.1.3",
     "husky": "3.0.8",
-    "jest": "25.5.4",
+    "jest": "26.0.0",
     "lint-staged": "9.4.2",
     "nodemon": "2.0.2",
     "pino-pretty": "3.6.1",