pui-core

pui-core is used at run time in 4 crates (of which 2 optionally).

Depender (with downloads and own rev deps)			pui-core version
	1	pui-cell		^0.5.2
		pui		^0.5.2
	1	pui-arena	optional	^0.5.2
	2	pui-vec	optional	^0.5.2