derive-ex

derive-ex is used at run time in 11 crates. It is a direct run-time dependency in 5 crates.

Depender (with downloads and own rev deps)			derive-ex version
330	1	lgbm		^0.1.8
280	1	text-grid		^0.1.7
150	4	slabmap		^0.1.8
		sigmut		^0.1.8
	3	rt-local		^0.1.4