v1.0.5

• Add OK::realpath().
• Split TypeIs::listString() from TypeIs::stringOrListString() and made it not use Cast, so it is less forgiving about string keys. (Like it's supposed to be.)
• Increase strictness.
• Working on github actions for possible future continuous integration.
• Be a little more rigorous about flexibility in accepting array keys in Cast & Iter, but not values.