Bump jest from 26.6.3 to 27.1.0 (#16376)

* Bump jest from 26.6.3 to 27.0.4

Bumps [jest](https://github.com/facebook/jest) from 26.6.3 to 27.0.4.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/jest/compare/v26.6.3...v27.0.4

)

---
updated-dependencies:
- dependency-name: jest
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* Set test environment for jest

* Remove unnecessary ext

* Bump jest from 27.0.4 to 27.1.0

* Remove --coverage option

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Yamagishi Kazutoshi <ykzts@desire.sh>

config/webpack/tests.js

 // Note: You must restart bin/webpack-dev-server for changes to take effect
 
 const { merge } = require('webpack-merge');
-const sharedConfig = require('./shared.js');
+const sharedConfig = require('./shared');
 
 module.exports = merge(sharedConfig, {
   mode: 'development',

package.json

@@ -14,7 +14,7 @@
     "test:lint": "${npm_execpath} run test:lint:js && ${npm_execpath} run test:lint:sass",
     "test:lint:js": "eslint --ext=js . --cache",
     "test:lint:sass": "sass-lint -v",
-    "test:jest": "cross-env NODE_ENV=test jest --coverage"
+    "test:jest": "cross-env NODE_ENV=test jest"
   },
   "repository": {
     "type": "git",
@@ -27,6 +27,7 @@
     "not dead"
   ],
   "jest": {
+    "testEnvironment": "jsdom",
     "projects": [
       "<rootDir>/app/javascript/mastodon"
     ],
@@ -174,13 +175,13 @@
     "@testing-library/jest-dom": "^5.14.1",
     "@testing-library/react": "^12.0.0",
     "babel-eslint": "^10.1.0",
-    "babel-jest": "^27.0.6",
+    "babel-jest": "^27.1.0",
     "eslint": "^7.32.0",
     "eslint-plugin-import": "~2.24.1",
     "eslint-plugin-jsx-a11y": "~6.4.1",
     "eslint-plugin-promise": "~5.1.0",
     "eslint-plugin-react": "~7.24.0",
-    "jest": "^26.6.3",
+    "jest": "^27.1.0",
     "raf": "^3.4.1",
     "react-intl-translations-manager": "^5.0.3",
     "react-test-renderer": "^16.14.0",