RTIC v0.5.x requires cortex-m-rt 0.6
In order to use current RTIC projects or the microamp you need to use RTIC v0.5.x
By specifying the dependency as a range, downstream users can pick c-m-rt 0.6 or get the default of 0.7 as they currently do.
I'm sure there are other uses of this but RTIC 0.5 compatibility is the main one for me.
RTIC v0.5.x requires cortex-m-rt 0.6 In order to use current RTIC projects or the microamp you need to use RTIC v0.5.x By specifying the dependency as a range, downstream users can pick c-m-rt 0.6 or get the default of 0.7 as they currently do. I'm sure there are other uses of this but RTIC 0.5 compatibility is the main one for me.