v5.3.4

v5 is not much of a priority, but the community has been hard at work submitting PRs, so here is a release of that effort.

• isPristine now differentiates between null and 0 #1673
• Create a initial form state before creating fields #1259
• Add a way to access the wrapped component from reduxForm HoC #1224
• Correctly handle tabbing over radio buttons #1759 #1438
• Do not parse empty strings for inputs of type number #1781
• Fix arrays of object fields #2146 #375
• Allow react-redux v5 as a peer dependency #2283