Fixing PTMCMC sampler failure, changing `!=2.1.0` to `<2.1.0`
This change is required because v2.1.1
released a few hours ago and the tests pull in this (incompatible) version given the current constraints.
Edited by Aditya Vijaykumar
This change is required because v2.1.1
released a few hours ago and the tests pull in this (incompatible) version given the current constraints.