feat: allow computing specific digests instead of all digests

[jeremylong]

Implement the ability to only generate the hash/digest for specific algorithms instead of all available algorithms. On extremely large projects, the digest calculation can add a significant amount of time.

This allows you to specify exactly which algorithms to use:

      List<Hash> hashes = BomUtils.calculateHashes(
          myFile,
          Version.VERSION_16,
          Arrays.asList(Hash.Algorithm.SHA_256, Hash.Algorithm.SHA_512) 
      );

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for ca1f2221	✅ 77.50%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (ca1f222)	Report Missing	Report Missing	Report Missing
Head commit (6c105bd)	6678	5063	75.82%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#776)	40	31	77.50%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

1. Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct. ↩

[stevespringett]

LGTM