remove h5py restriction

[martin-springer]

Describe your changes

Removes h5py dependency restriction.

Issue ticket number and link

Fixes #278

[codecov-commenter]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 71.66%. Comparing base (51172fd) to head (9dbeb52). :warning: Report is 20 commits behind head on development.

Additional details and impacted files

@@             Coverage Diff              @@
##           development     #280   +/-   ##
============================================
  Coverage        71.66%   71.66%           
============================================
  Files               40       40           
  Lines             4524     4524           
============================================
  Hits              3242     3242           
  Misses            1282     1282           

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