Enhancements to Component Proptypes

[BrandonDenham]

Started using the @component tag and was hoping there could be some new features:

Support for @ignore on a propType - sometimes certain props are connected to context/redux/hoc/etc and don't need a particular prop documented.

Ability to overwrite the prop "type" with a typedef or standard jsdoc type. PropTypes.shape, for instance isn't specific enough for some use cases.

[wojtek-krysiak]

@BrandonDenham - we use react-docgen package when parsing prop types. I've upgraded it to the latest version so maybe it will have more features