WHOIS Fix and Additions

[puzzlepeaches]

Morning! I hope you had a good new year!

I was running into some issues with the whois lookup and did the following to fix:

• Added whois package to requirements.txt
• Changed the whois lookup to work properly with the latest version of the package

I also added the following command line flags and features:

• Silent mode to disable printing to stdout
• Single file mode to save results to a single JSON file as opposed to multiple
• Option to specify filename instead of using the tool-generated name

Some notes on these features:

• The filename and single-file options are mutually exclusive. i.e., it is currently impossible to specify the filenames of all output files when not using the single-file mode.

My IDE automatically formatted the file using Black, so I apologize for the big changes to the original script. Let me know if you have any questions or want me to make additional revisions before merging. Thanks!

[debifrank]

Hey @puzzlepeaches, thanks for the contribution. I really like how black formats actually. I'll have to migrate over to it.

After comparing the diffs, everything looks good to me.