Bump @types/jest from 25.2.3 to 26.0.4 (#120)

Bumps [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest) from 25.2.3 to 26.0.4.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/jest)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

package.json

@@ -48,7 +48,7 @@
   },
   "devDependencies": {
     "@types/classnames": "^2.2.10",
-    "@types/jest": "^25.1.0",
+    "@types/jest": "^26.0.4",
     "@types/react": "^16.9.34",
     "@types/react-dom": "^16.9.7",
     "cross-env": "^7.0.0",