PureComponent doesn't actually compare state

[foxydevloper]

The implementation of PureComponent doesn't actually compare state as documented in https://roblox.github.io/roact/performance/reduce-reconciliation/#purecomponent and https://roblox.github.io/roact/api-reference/#roactpurecomponent

roact/src/PureComponent.lua

Lines 16 to 20 in 956891b

	-- In a vast majority of cases, if state updated, something has updated.
	-- We don't bother checking in this case.
	if newState ~= self.state then
	return true
	end