sk-core

sk-core is used at run time in 5 crates.

Depender (with downloads and own rev deps)			sk-core version
140	3	sk-store		^2.0.0
120		sk-ctrl		^2.0.0
120		sk-driver		^2.0.0
120		skctl		^2.0.0
120		sk-tracer		^2.0.0