chore(deps): update jest monorepo to v26

package.json

@@ -91,7 +91,7 @@
     "autoprefixer": "9.7.5",
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "10.1.0",
-    "babel-jest": "25.2.6",
+    "babel-jest": "26.0.0",
     "babel-preset-gatsby": "0.3.1",
     "browserslist": "4.11.1",
     "concurrently": "5.1.0",
@@ -106,8 +106,8 @@
     "flow-typed": "^3.1.0",
     "gh-pages": "2.2.0",
     "identity-obj-proxy": "3.0.0",
-    "jest": "25.2.7",
-    "jest-cli": "25.2.7",
+    "jest": "26.0.0",
+    "jest-cli": "26.0.0",
     "lost": "8.3.1",
     "postcss-pxtorem": "5.1.1",
     "react-test-renderer": "16.13.1",