Update jest monorepo to v26

Author: renovate-bot

package.json

@@ -56,12 +56,12 @@
     "@babel/core": "7.9.0",
     "@babel/preset-env": "7.9.0",
     "babel-eslint": "10.1.0",
-    "babel-jest": "25.2.3",
+    "babel-jest": "26.6.1",
     "eslint": "6.8.0",
     "eslint-plugin-jest": "23.8.2",
     "flow-bin": "0.120.1",
     "husky": "3.1.0",
-    "jest": "25.2.3",
+    "jest": "26.6.1",
     "lint-staged": "10.0.9",
     "prettier": "1.19.1"
   }