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

@@ -1,7 +1,7 @@
 // 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',