DRAFT: breaking changes

[JoviDeCroock]

A branch to collect breaking changes on so we can verify size and performance offset.

Breaking changes

Byte offsets are calculated on the module build.

• Remove hack for .remove() in IE11 -18b
• Remove IE11 select fix -13b
• Remove .base -13b
• Switch to queueMicrotask -30b
• Remove replaceNode -24b (could be more depending on what we decide to do with mutative renders)
• Move defaultProps to compat -75b (+50 compat)
• Remove automatic px suffixing -77b (+109 compat)
• Forward ref by default +14b (-50 compat)

Subtotal -240b

Experiments we could run

• Splitting up mount/update - This wouldn't be breaking but could generally speed up mounting and create hot-paths/less confusion.
• Backing nodes - the biggest breakage here would be ecosystem packages and consumers relying on our options API. We could make an effort for compatibility with our VNode structure here.
• Working on streaming/async rendering/hydration

[coveralls]

coverage: 99.486%. remained the same
when pulling a1c6988 on breaking-changes
into 2f1712a on main.