Add support for Biologic mpr data version 3

[inger-emma]

Is your feature request related to a problem? Please describe. I have mpr data version 3 files

Describe the solution you'd like Adapt Biologic reader to handle data version 3 files

Describe alternatives you've considered None

Additional context Already solved in Galvani It looks like this issue is different from https://github.com/jepegit/cellpy/issues/87 and https://github.com/jepegit/cellpy/issues/187

[jepegit]

Hi. I have updated the biologic reader a bit.