Update jest monorepo to v26

Author: renovate-bot

package.json

@@ -42,10 +42,10 @@
     "@babel/preset-env": "7.9.5",
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "10.1.0",
-    "babel-jest": "25.1.0",
+    "babel-jest": "26.2.1",
     "eslint": "6.8.0",
     "flow-bin": "0.127.0",
-    "jest": "25.1.0"
+    "jest": "26.2.1"
   },
   "babel": {
     "presets": [