tcgeneric

tcgeneric is used at run time in 7 crates.

Depender (with downloads and own rev deps)			tcgeneric version
150	6	tc-value		^0.6
140	5	tc-transact		^0.6
100	2	tc-btree		^0.6
	2	tc-table		^0.6
		tinychain		^0.6
	2	tc-tensor		^0.6
	1	tc-math		^0.6