Move @types/react to dependencies.

[tai2]

Because @types/react is placed in devDependencies, I cannot have @types/redux-persist-expire test passed. Why it can't? My package depends on a type which redux-persist exposes, so it declares redux-persist as a dependency. When DefinitelyTyped's CI runs, it installs dependent packages then run tests and fails. @types/react won't be installed because it is declared in devDependencies.

As well as source code itself, @types dependencies should also be installed when install the library.

[wouterds]

Just install it as a dependency in your project, it's not a dependency of this project.

[tai2]

I can't install it in my project which is a DefinitelyTyped's subproject. Because DT doesn't permit me to install it in devDependencies.

[tai2]

Further discuttions:

• Saving npm @types typings with --save or --save-dev
• Why --save instead of --save-dev? #81

dependencies is preferred way in our case as long as I understand it.

[tai2]

In addition to what I mentioned above, DT doesn't permit me to import what I don't directly use. @types/react is an indirect dependency for my package.