Compress features output as bzip

[dkudeki]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (a7f904d) to head (526bedf).

Files with missing lines	Patch %	Lines
.../hathitrust/htrc/tools/featureextractor/Main.scala	0.00%	7 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main      #5   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files          8       8           
  Lines        187     192    +5     
  Branches      14      10    -4     
=====================================
- Misses       187     192    +5     

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