connect: pass ownProps to areStatesEqual

[jspurlin]

This PR adds the ability for consumers to have access to ownProps inside of areStatesEqual.

Currently there is no way to

See: https://github.com/reduxjs/react-redux/issues/781

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[jspurlin]

Ping, @markerikson & @timdorr can you take a look at this PR?

[jspurlin]

@timdorr and @markerikson, is this (and #1952) good to be merged? (I don't currently have write access so I can't merge it)

[kysedate]

@timdorr, @markerikson, can this change and #1952 be merged?

[markerikson]

Sorry, React-Redux has been pretty low on the time/mental priority list lately, but taking a look at things tonight.