Create reduceReducers util

[EskiMojo14]

Based on https://github.com/redux-utilities/reduce-reducers/, but with (hopefully) better typings.

[codesandbox-ci[bot]]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

[EskiMojo14]

Size Change: +99 B (+2.13%)

Total Size: 4.76 kB

Filename	Size	Change
dist/redux.legacy-esm.js	4.76 kB	+99 B (+2.13%)

_{compressed-size-action}

[netlify[bot]]

✅ Deploy Preview for redux-docs ready!

Name	Link
🔨 Latest commit	2d0d0b636b1ea0425fbfe527eb960e41de497f89
🔍 Latest deploy log	https://app.netlify.com/sites/redux-docs/deploys/66f6b326d15d770008356d57
😎 Deploy Preview	https://deploy-preview-4744--redux-docs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[aryaemami59]

Excited for this. Do you think this needs a type test as well?

[EskiMojo14]

Excited for this. Do you think this needs a type test as well?

can do - combineReducers doesn't really have one as far as i can tell, so i was following that precedent