deprecated proptype validation cannot be disabled by environment state

[MichaelRando]

Latest node_modules/prop-types/checkPropTypes.js doesn't like the prop type validations. I cannot turn them off because DEV is hardcoded true via:
const DEV = typeof process==='undefined' || !process.env || process.env.NODE_ENV!=='production';

I don't use a mock process lib in the browser, so there's not a easy string substitution that will toggle off that DEV=true.

The warning text is
Warning: You are manually calling a React.PropTypes validation function for the 'store' prop on 'Provider'. This is deprecated and will not work in production with the next major version. You may be seeing this warning due to a third-party PropTypes library. See https://fb.me/react-warning-dont-call-proptypes for details.

[developit]

Hmm - prop-types isn't yet used by preact-compat, it seems like you wanted proptypes:

<script src="//unpkg.com/proptypes"></script>

With that you won't see the warning. We're looking at switching to the new module in #351 & #352, but due to that warning we've not yet made the move.

[lukeed]

Probably can be closed, we've moved to prop-types module.