Please add ship_date to parameters!

[MasonFabian]

I want to use this tool to count how many orders were shipped on a given date, but currently ship_date is not a parameter I can use.

I have been tinkering trying to add it myself, but haven't had any success so far :(

I don't think this is where feature requests go, but I couldn't find where else to put it so I apologize if this is the wrong spot!

Love the code though! I learned a lot snooping around, and have made something that works as a more in-depth "insights" page