Expose router reducer

[sgal]

I created this PR to follow up on #132 and #140. One is closed and other one is stale, so hopefully this one gets to be merged

What kind of change does this PR introduce?

Refactoring and bugfix.

What is the motivation behind this change?

Align public API with react-router-redux and allow various integrations (redux-loop, rematch, etc.). As a consequence - fix for #133.

Did you add tests for your changes?

Yes, existing tests are updated and new one for #133.

Did you update the documentation?

Yes, both plain and immutable structure docs are update. All examples are also updated.

Does your PR introduce a breaking change?

Yes, public API is changed so major release is needed for this.

Fixes #133 #104 #79 . Closes #140

[schnubor]

2 PRs for such an essential feature and still none of them is merged, meh.

[supasate]

This is a really great PR! Due to it will change the way we use this library, it'll be a major update. I'd like to make sure that I spend enough time to check it thoroughly (I'll try it this or next weekend). In the meantime, I'd like the community to help check it if it breaks anything you're using or not if you migrate to this one.

[sgal]

I've tested this this PR in our app (30+ routes, 10k+ modules) and it works as expected. Did you have time to test it @supasate?

[YUANLIN327]

@supasate , it's been more than two weeks since you mentioned about checking the update. Would you please merge it ASAP?

[Eomerx]

when dou you guys will merge this pull request and publish a new tag? There is no point to return new state every time an action is dispatched.

[sgal]

@Eomerx I’m wondering about the state myself. Seems like @supasate completely forgot about this repo. Which also brings a lot of questions regarding reliability of this package.

[supasate]

I'm going to check on it this weekend (finger crossed). I'm super busy last month. Sorry about that.

[supasate]

The logic looks solid and It works like a charm! I really appreciate your end-to-end contribution for the description, codebase, test, examples, and documentation. Thank you for your patience in my very slow response!

[supasate]

Released in v5.0.0!