Framework: Upgrade to react-redux v5

[ockham]

5.0.0 has finally been released. From the ChangeLog:

• Backwards compatible API
• Major internal changes
• Significant performance improvements in common usage patterns

Version 5.0 maintains API compatibility with v4.x but due to major internal changes and potential behavior differences across nearly all API surfaces, semver dictates a major version bump. [...] Store state change notifications sent to components are now guaranteed to occur top-down, so if your code may behave differently if it relied on notifications happening out of order.

To test:

• Verify that Calypso still works as before (obviously 😉 )
• For the theme sheet specific change:
  • Navigate to a theme sheet on a page of yours (the theme shouldn't be currently active on that page), i.e. http://calypso.localhost:3000/theme//<yoursite.wordpress.com>.
  • Click the activate button
  • Watch a modal show up, with a loading spinner first, and a "Thank you for choosing..." message afterwards.
  • Verify that the "Activate" button's label has changed to "Customize"

cc @aduth @gwwar @blowery @ehg @mtias

[matticbot]

Test live: https://calypso.live/?branch=upgrade/react-redux-5

[gwwar]

Shiny. Any places we can think of to do some profiling comparisons?

[aduth]

FYI that final release is expected this week: reduxjs/react-redux#473 (comment)

[ockham]

Updated to the final release, rebased, and squashed. I'd say this is ready for review.

[aduth]

This works well in my testing. Were there instructions for checking regressions on the theme component changes?

I'm excited for this release, but wonder if we should sit on it for a few days in case there are bugs to be shaken out in a patch version. Their issues list is pretty quiet so far, so maybe a smooth release.

[ockham]

This works well in my testing. Were there instructions for checking regressions on the theme component changes?

Not really, sorry -- it's kind of buried in the comment this PR removes. I've added instructions to the PR desc.

I'm excited for this release, but wonder if we should sit on it for a few days in case there are bugs to be shaken out in a patch version. Their issues list is pretty quiet so far, so maybe a smooth release.

Sounds good to me

[gwwar]

Branch looks pretty good so far. 👍 I wasn't able to find any obvious regressions. Let's wait for a few more folks to 👀

[withinboredom]

IE and Edge look good here

[gwwar]

👍 5.0.1 also works well for me. Let's 🚢 tomorrow morning if no one finds any blockers.