update FluoTomoScan
avoid importing matplotlib if imageio is not here and make sure imageio is an optional dependency.
Related to pipeline https://gitlab.esrf.fr/tomotools/nxtomomill/-/jobs/1173001
Edited by payno
avoid importing matplotlib if imageio is not here and make sure imageio is an optional dependency.
Related to pipeline https://gitlab.esrf.fr/tomotools/nxtomomill/-/jobs/1173001