chore(deps): update jest monorepo (major) (#5457)

jest.config.js

@@ -12,4 +12,5 @@ module.exports = {
   testURL: 'http://localhost:8080',
   snapshotSerializers: ['jest-emotion'],
   transformIgnorePatterns: ['node_modules/(?!copy-text-to-clipboard)'],
+  testEnvironment: 'jsdom',
 };

package.json

@@ -106,7 +106,7 @@
     "axios": "^0.21.0",
     "babel-core": "^7.0.0-bridge.0",
     "babel-eslint": "^11.0.0-beta.2",
-    "babel-jest": "^26.0.0",
+    "babel-jest": "^27.0.0",
     "babel-loader": "^8.0.5",
     "babel-plugin-emotion": "^10.0.9",
     "babel-plugin-inline-json-import": "^0.3.2",
@@ -137,8 +137,8 @@
     "gitlab": "^14.1.1",
     "http-server": "^0.12.0",
     "husky": "^4.0.0",
-    "jest": "^26.1.0",
-    "jest-cli": "^26.1.0",
+    "jest": "^27.0.0",
+    "jest-cli": "^27.0.0",
     "jest-emotion": "^10.0.32",
     "js-yaml": "^4.0.0",
     "mockserver-client": "^5.8.0",

packages/netlify-cms-proxy-server/package.json

@@ -40,7 +40,7 @@
     "@types/morgan": "^1.7.37",
     "@types/node": "^14.0.0",
     "@types/vfile-message": "^2.0.0",
-    "jest": "^26.1.0",
+    "jest": "^27.0.0",
     "netlify-cms-lib-util": "^2.13.1",
     "nodemon": "^2.0.2",
     "ts-jest": "^26.0.0",