Adding chalk for colorful console logging for cleaner code

[lirantal]

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[lirantal]

@typicode would you like me to update this PR with latest master for merging?

[typicode]

@lirantal thank you for the PR and help.

But since there's only one color in the project, I feel like adding a whole lib for that is a little too much (even though chalk is awesome and would make the code cleaner).
I prefer to have less dependencies.

[lirantal]

@typicode I agree. Keep up the good work!