Bump jest from 23.6.0 to 26.0.1

Bumps [jest](https://github.com/facebook/jest) from 23.6.0 to 26.0.1.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](jestjs/jest@v23.6.0...v26.0.1)

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

package.json

@@ -60,7 +60,7 @@
     "happypack": "^5.0.1",
     "html-loader": "0.5.5",
     "html-webpack-plugin": "^3.2.0",
-    "jest": "^23.6.0",
+    "jest": "^26.0.1",
     "json-loader": "0.5.7",
     "postcss-import": "12.0.1",
     "postcss-loader": "3.0.0",