Feat/st lib constexpr instanceof()

[FoniksFox]

What the title says, it's just 1 keyword added, I tested it, it works no problem

[github-actions]

ST-LIB Release Plan

• Current version: 6.0.0
• Pending changesets: 1
• Highest requested bump: minor
• Next version if merged now: 6.1.0

Pending changes

• minor It is just a one word change, makes it possible to use Board::instanceof() to get a constexpr auto& obj. It works perfectly as long as you don't try using the reference before Board::init(). (.changesets/feat-stlib-constexpr-instanceof().md)

[oganigl]

I like the idea