Add method get_time_array to the File class

[rocco8773]

The PR adds the get_time_array() method to the bapsflib File class. This method will take either an HDFReadData object generated by File.read_data() or a digitizer information dictionary generated by File.get_digitizer_specs() to build the time array or retrieve the time array from the appropriate dataset.

The time array will be constructing if the digitizer meta-data contains the digitizing "clock rate". If the time series is stored in a dataset indicated by the "time_dset_path" meta-data, then that dataset will be directly retrieved.

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• Created method get_time_array() on the File class.
• Updated get_digitizer_specs() to retrieve the information dictionary from construct_dataset_name() instead of get_adc_info(). This maintains consistency with the info dict generated by HDFReadData.
• Fixed bug in the returned info dictionary generated by construct_dataset_name, where the mapping configs dictionary would be modified if that returned dictionary was modified.
• Updated all tests to maintain required coverage.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.86%. Comparing base (e173bf2) to head (191319b).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #186      +/-   ##
==========================================
+ Coverage   98.71%   98.86%   +0.14%     
==========================================
  Files          54       54              
  Lines        3729     3772      +43     
  Branches      717      727      +10     
==========================================
+ Hits         3681     3729      +48     
+ Misses         43       39       -4     
+ Partials        5        4       -1     

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