chore: bump jest from 26.1.0 to 26.4.2 in /web3.js (#12179)

Bumps [jest](https://github.com/facebook/jest) from 26.1.0 to 26.4.2.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/jest/compare/v26.1.0...v26.4.2)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

web3.js/package.json

@@ -121,7 +121,7 @@
     "flow-bin": "0.130.0",
     "flow-typed": "3.2.1",
     "fs-file-tree": "1.1.1",
-    "jest": "26.1.0",
+    "jest": "26.4.2",
     "marked": "^1.1.0",
     "prettier": "^2.0.0",
     "rimraf": "3.0.2",