Bitmap implementation

[scikit-mine]

Bitmap implementation

[remiadon]

Closing this, no big opponents for now

[remiadon]

I already tried replacing roaringbitmap==0.7 by pyroaring==2.9.1 (another implementation), unittests are passing
I also re-ran the benchmarks, for SLIM there is no real difference, for LCM it drops by a factor of 1.2, which is acceptable

[remiadon]

I aslo had a bug running https://github.com/scikit-mine/scikit-mine/pull/80/checks?sha=1818177e56e32daf7ce21480b3a98411f91ad2eb when installing dependencies on ubuntu-latest with python 3.x (which turned into 3.9)

I (quick)fixed it by setting python-version: 3.7 in the CI

[remiadon]

#93 is using pyroaring because I got into big segfaults using roaringbitmap

Also note that pyroaring has a next_set_bit method, that appears to be very useful for sequential pattern mining, to answer questions like : "I am on position x, what is the next occurrence of event e from this position"

[thomasbtnfr]

Since v0.0.8, pyroaring is now used because roaringbitmap is not compatible with Python 3.11 at the moment.