All orders start date parameter

[noLeash]

Hello, and I'm excited to submit my first pull request. I have discovered that by adding a parameter of updated_at[gte]=start_date request URL via the arguments for option_orders_url() and orders_url(), it is possible to limit the order request by start date, proportionally speeding up the time required to receive a short list of orders.

I have tested with pytest and confirmed that the results are in an independent test. Results with two different dates are attached.

If you have any feedback or notes on my contribution process, I would be grateful to know if I submitted everything correctly or not.

[mw66]

@jmfernandes can you take a look and merge this PR?

[jmfernandes]

There’s a small error in the URLs. If both account number and start_date are provided there will be two question marks added to string. There should be only 1 question mark and an & between the values like this

?account=blah&updated_at=blah

[noLeash]

@jmfernandes, I've corrected the url functions for options_order_url() and orders_url() please let me know if there are any other edits required to merge.

[mw66]

@jmfernandes can you make a new release after merge this PR? It's an important performance fix.