OnceMap

OnceMap is used at run time in 17 crates (of which 1 optionally). It is a direct run-time dependency in 6 crates.

Depender (with downloads and own rev deps)			OnceMap version
140	1	ploys		^0.4.21
	2	solar-sema		^0.4.20
	2	bones_ecs		^0.4.12
		unitedservices_common		^0.4.5
	2	usc		^0.4.5
	1	weev	optional	^0.4.19