Fastdup version check: warning vs. RuntimeError
The RuntimeError returned by the version check in init.py forces users to upgrade to the newest versions of Fastdup, which may not always be compatible with other versions of libraries that the user has intentionally selected for other reasons. Because you release new versions of Fastdup so frequently, this error is encountered again very quickly even after the user resolves his or her dependency issues.
I propose switching this version check to a warning rather than a RuntimeError. My temporary fix right now is to catch the RuntimeError during imports, but I think a warning is more appropriate.