Some of the code like this can be replaced by using Lodash methods. I'll let a beginner tackle this if interested 😉

Version output support. Add both -v and --version flags to output version information. Can function similarly to the help output feature - The application should exit after the version information is output.

If run, the following output is expected:

$ linkmon -v
v0.1.1

$ linkmon --version
v0.1.1