Add tests for utility files

[itaisteinherz]

We need to add tests for source/util.js, source/version.js, source/git-util.js and source/npm/util.js.

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[0xch4z]

Working on this now. I plan to put several PRs up for testing each domain

• [x] source/util.js (PR #419)
• [ ] source/version.js
• [ ] source/git-utils.js
• [ ] source/npm/util.js

[Baidaly]

Hey @Charliekenney23, are you planning to continue working this issue?

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