Test enum utilities

[glenflorendo]

Description

This PR provides complete testing of the enum utility functions.

Enum Utilities
    getNth
      ✓ gets the nth enum (2 ms)
      ✓ returns undefined for out-of-bounds nth
    getFirst
      ✓ gets first enum
      ✓ returns undefined for empty enum

Related Issues

Resolves #586

Testing

• Ran existing testing suites
• Wrote new tests

-----------------------------------------------|---------|----------|---------|---------|-----------------------
File                                           | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s     
-----------------------------------------------|---------|----------|---------|---------|-----------------------
 src/shared/lib/utilities                      |   24.13 |        0 |   33.33 |      15 |                       
  enum.ts                                      |     100 |      100 |     100 |     100 |                       

Checklist

• [x] I have followed all conventions outlined in our documentation.
• [x] I have fully tested my changes and confirmed that all new and existing tests pass.
• [x] I have written meaningful commit messages for all changes.
• [x] I have linted and formatted my changes to follow the code style of this repository.
• [x] I have updated our documentation, accordingly.
• [x] I have checked currently opened pull requests to ensure that there are no pending pull request for the same changes or issues.
• [x] I have confirmed that this pull request fully meets the acceptance criteria for all related issues listed above.

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[glenflorendo]

Fixed merge conflicts.