Fix typing for create-emotion-styled

[Ailrun]

What:

1. All types introduced in Add typing for create-emotion-styled #668 live in single file, so it's hard to write preact type using common things.
   I do really hate global JSX namespace idea.
2. It used ReactHTML, but it's not an interface for props, but for factories. Therefore it does not provide HTML attributes like onClick as props.
3. ReactHTML problem occurs because of lack of tests, so I add some tests too.

Why: Typing introduced in #668 is wrong.

How: By using JSX.IntrinsicElements

Checklist:

• [N/A] Documentation
• Tests
• Code complete

[emmatown]

LGTM

One thing I forgot about last time is the shorthand, while it only works with the babel plugin, there are many people who run ts and then babel with babel-plugin-emotion so could you make this work?

styled.div(...styles)

[Ailrun]

@mitchellhamilton
Oh, I also forgot about to ask it. Does babel plugin work with create-emotion-styled too?

[emmatown]

@Ailrun yes, the babel plugin does work with create-emotion-styled.

[emmatown]

Is there a reason this needs Theme extends object = any whereas the shorthand one doesn't need = any?

[Ailrun]

@mitchellhamilton CreateStyled is access point of all API, where CreateStyledShorthands is just a base interface (well, it's not really interface, but in some way, it's similar to interface) of CreateStyled.
Therefore, CreateStyled is one used by user, so I put the default type on this interface only.

[emmatown]

Thanks!!