Support react-native-platform-touchable in accessible-touchable

[jevakallio]

The react-native-platform-touchable component is a commonly used interface for platform Touchable* primitives.

The suggested usage from their docs is:

import Touchable from 'react-native-platform-touchable';

The tricky bit is that since this is a default import, people can call the variable whatever they want, e.g. "PlatformTouchable".

Three alternative solutions to this:

• Strict: Covers components called just "Touchable". Relies on convention.
• Loose: Cover any component that includes the string Touchable in their name. Relies on semantics.
• Options: Add an array of additional names as an option to the style. Future-proof, as people can then also add completely different names, e.g. "Smooshable" (or whatever). Relies on people reading the docs, and is slightly more work intensive.

I'm leaning on the combination first and last option: Include "Touchable" by default, and add an extensibility options.

In either case, this is a low-priority enhancement.

@knitcodemonkey thoughts?

[knitcodemonkey]

I agree, but the strict list should include the list of known touchable components with a stretch goal for adding the options for extensibility. Does that sound good to you?

[jevakallio]

Ok, so to summarise, the way we'll break this down is to just add Touchable to the list of known touchable components since it's a common convention and complies to the built in Touchable* interface.

I'll add a separate, even-lower-prio enhancement for adding a configuration option for more names