Specify slide out time, TypeScript typings

[danielholmes]

Apologies for the multiple updates in one - I'll be happy to pick them apart individually if you're only interested in some. Updates here include:

• Ability to pass a slideOutTime to the show method
• Ability to override any of the styles via an optional style prop
• TypeScript typings

Let me know your thoughts and if you want any modifications.

[carsonwah]

Sorry for the late reply and thanks for the PR!

slideOutTime, linting and typescript are all good. Great job! For the style part, I think there are too many customization props in this way. It will be cleaner and more intuitive if we let user pass their custom components instead of styling props. Let me know what you think.

[danielholmes]

@carsonwah Yea that sounds good to me. How granular were you thinking? e.g. optional ContentTitle, ContentText, HeaderTime components. Or just a custom component that goes inside the <TouchableWithoutFeedback ? Or maybe a renderProp style approach

[carsonwah]

@danielholmes I think we can take the approach from another PR #17. It takes a renderPopupContent function prop.

just a custom component that goes inside the <TouchableWithoutFeedback> <- exactly

[danielholmes]

@carsonwah I've removed the custom styling/rendering from this PR - I didn't realise there was another open, so I'll leave that task to #17

[carsonwah]

@danielholmes Merged. Thanks so much for the contribution. I will release a new version asap, maybe together with #17.