v0.1.2

This release fixes a compilation error of constriction in no_std mode. It does not affect constriction's behavior in default mode.

It turns out the probability create doesn't seem to work in no_std mode, so we have to provide mock replacements for the two (tiny) traits from probability on which we rely when compiling in no-std mode. When compiling in default mode we continue to use the original traits so that constriction can be used together with probability.

This release is not a breaking change because it only changes behavior in no_std mode, in which, as it turned out, the previous releases didn't compile anyway.