React.PropTypes deprecated, use prop-types package

[jkelin]

https://facebook.github.io/react/warnings/dont-call-proptypes.html
React.PropTypes is deprecated, this PR switches to prop-types package

[coveralls]

Coverage increased (+0.03%) to 96.33% when pulling e931ddc on jkelin:master into 20a74a8 on FormidableLabs:master.

[jkelin]

Your CI seems to be broken, builder run build works flawlessly for me. It looks like it does not do npm install

[Stanley-Jovel]

Any news on this?

[ryan-roemer]

So the issue here is:

1. The builder archetype builder-radium-component does a production-pruned build.
2. React is a peerDependency and devDependency, and it's an external in webpack config, so the prod build works fine for a postinstall without React being installed. But prop-types is not a peerDependency nor (more importantly) a webpack external in the archetype.
3. This project doesn't actually have a package.json:postinstall step that archetype was crafted to support (the complicated world of cleverly supporting both git and npm-based dependencies).

... so that's a lot going on. Here's the fastest, probably best path out:

1. Open an upstream PR (that will need to be merged first) on https://github.com/FormidableLabs/builder-radium-component/blob/master/config/webpack/webpack.config.js#L31-L48 to add an external for prop-types just like react and radium.

2. Move

       "builder": "^3.1.0",
       "builder-radium-component": "^2.1.2",
       "coveralls": "^2.11.14",
   

   to devDependencies.

3. Add prop-types to peerDependencies just like React

4. Edit this projects .travis.yml to remove the npm prune --production pruning at: https://github.com/FormidableLabs/radium-grid/blob/master/.travis.yml#L29 -- we don't have a postinstall in this project, so we don't need to make sure production deps build the project.

@rgerstenberger @alexlande @kenwheeler -- Does all of ^^^^ sound like the right way to go?