chore(deps-dev): bump jest from 24.9.0 to 26.6.1 in /client

Bumps [jest](https://github.com/facebook/jest) from 24.9.0 to 26.6.1.
- [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/v24.9.0...v26.6.1)

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

client/package.json

@@ -108,7 +108,7 @@
     "babel-plugin-transform-imports": "^1.5.1",
     "chokidar": "^2.1.5",
     "copy-webpack-plugin": "^5.1.2",
-    "jest": "^24.9.0",
+    "jest": "^26.6.1",
     "monaco-editor-webpack-plugin": "^1.9.0",
     "react-test-renderer": "^16.10.2",
     "redux-saga-test-plan": "^4.0.1",