Fixed running on ubuntu noble & python 3.12
Click-reviewers-tools currently fails to build on Ubuntu Noble: https://launchpad.net/~bhdouglass/+archive/ubuntu/clickable/+build/28564684
This is due to the imp
module being removed from Python 3.12. This PR updates click-reviewers-tools to use importlib as suggested by the Python 3.12 changelog: https://docs.python.org/3/whatsnew/3.12.html#imp