CLI outputs broken link, path, and line number.

[justindhillon]

Based on user feedback, the CLI has been changed to include file:line.

Before:

Broken Link: https://www.un.org/en/thispagedoesnotexist
Broken Link: https://www.un.org/en/thispagedoesnotexist
Broken Link: https://www.nasa.gov/unknown-page

After:

Broken Link: https://www.un.org/en/thispagedoesnotexist
Path: tests/links/brokenLinks
Line: 5

Broken Link: https://www.un.org/en/thispagedoesnotexist
Path: tests/links/subfolder/brokenLinks
Line: 5

Broken Link: https://www.nasa.gov/unknown-page
Path: tests/links/subfolder/brokenLinks
Line: 2

Thank you @kristapsk for the feedback! This resolves #76.