`bind` HOC should provide a proper type for `RefObject<>`

[PinkyJie]

If we have a form component like this:

class UnconnectedFormComponent extends React.Component<FormComponentProps>{...}

export const FormComponent = bind(FormComponentProps)(UnconnectedFormComponent)

When we use it, we want to pass a ref:

// Note the "any" here
public ref: React.RefObject<any> = React.createRef();
<FormComponenrt ref={ref} />

The actual reference type should be BoundComponentInstance, but if we use this, there will be type mismatch issue.

[valendres]

This will be fixed in V2: #7

[valendres]

Re-opening this issue as it has not been fully addressed. There are some instances where the type is still wrong.

[PinkyJie]

I feel like we still need to utilize forwardRef to handle this somehow.
When you pass a ref to the BoundComponent, the ref should be forwarded to the actual form component inside.