API Refresh / Update Implementation and Models

[jaredbroad]

Expected Behavior

API SDK up to date with current models and features.

Actual Behavior

API SDK roughly 4 years old.

Potential Solution

Update the API classes (https://github.com/QuantConnect/Lean/blob/master/Api/Api.cs).

Checklist

• [x] I have completely filled out this template
• [x] I have confirmed that this issue exists on the current master branch
• [x] I have confirmed that this is not a duplicate issue by searching issues