PyPi version is out of date

[DEUCE1957]

Problem: PyPi release of Chronix2Grid is incompatible with latest PyPsa version (1.1.2), specifically fails on net.lopf() (should be net.optimize()) and .mremove (should be remove()).
Solution: Update new release of Chronix2Grid based on the latest GitHub (the github repo already has the correct function call). Integrate PR request (#92) to fix the issue with mremove().