Bump jest from 25.1.0 to 26.4.2

Bumps [jest](https://github.com/facebook/jest) from 25.1.0 to 26.4.2.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](jestjs/jest@v25.1.0...v26.4.2)

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

package.json

@@ -48,7 +48,7 @@
     "eslint-plugin-import": "2.20.1",
     "file-loader": "6.0.0",
     "image-webpack-loader": "6.0.0",
-    "jest": "25.1.0",
+    "jest": "26.4.2",
     "node-sass": "4.13.1",
     "npm-run-all": "4.1.5",
     "sass-loader": "8.0.2",