[NRRPLT-7941] updated requirements to python 3.8 compatible versions

hbp_nrp_virtual_coach/requirements.txt

 # HBP/NRP dependencies
-bbp-client==0.4.4  # EPFL_SPECIFIC
+# bbp-client==0.4.4  # EPFL_SPECIFIC. TODO: makes pip install fails. Investigate why, or even better, replace it with some other OIDC python client
 
 # third-party dependencies
-future==0.18.2
+future
 texttable==0.8.7
 progressbar2==3.34.0
 httplib2==0.12.1
-pandas==0.22.0
-ipywidgets<=7.5.1; python_version<"3.0"  # v8.0.0 incompatible with python 2
+pandas==1.0.5
 jupyter==1.0.0
 requests
-ipykernel==4.6.0
+ipykernel==5.3.2
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