Move React to peerDependecies and devDependencies

[maksis]

Having React in dependencies causes confusing errors when people upgrade their projects to use React 15 due to multiple (conflicting) copies of React being loaded by the browser. Seems like this project used to have React in peerDepencencies but for some reason that was changed in 5834e92

Related discussion: JedWatson/react-select#88

[gcanti]

Hi @maksis,

would it be correct to move react to peerDependencies and to add v15?

"dependencies": {
-  "react": "^0.14.0",
  "tcomb-form-templates-bootstrap": "^0.2.0",
  "tcomb-validation": "^3.0.0"
},
+"peerDependencies": {
+  "react": "^0.14.0 || ^15.0.0"
+}

[maksis]

You'll probably want a dev dependency as well for running the tests

[gcanti]

Released in https://github.com/gcanti/tcomb-form/releases/tag/v0.9.3