Specify possible type values for TextInput

[mperrotti]

Currently, the type prop of TextInput accepts any string. I propose we limit it to only accept the kinds of inputs we want to allow.

I propose we update TextInputProps['type'] to:

type?: 'email' | 'number' | 'password' | 'search' | 'tel' | 'time' | 'url'

If we decide to move forward with this, we should consult the a11y team to make sure all of those native input types are accessible.

This would have to go out in the next major release because it would be a breaking change.

[mperrotti]

This was briefly discussed on Slack, and there was no opposition at the time of this comment being posted.

Slack thread (only available to Hubbers)