feat: added initial dependencies parser implementation

[Kirill89]

• [x] Ready for review
• [x] Follows CONTRIBUTING rules
• [ ] Reviewed by Snyk internal team

What does this PR do?

Added initial dependencies parser implementation.

TODOs:

• parse nuget dependency options
• handle comments in parseGroupOption
• parse clitool source
• parse git source
• parse gist source
• parse http source

But I believe we can continue without it for now.

[snyksec]

:tada: This PR is included in version 1.2.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: