Update to latest Python 3.8

[Martin-Molinero]

Expected Behavior

• Update to Python 3.8

Actual Behavior

• Using deprecated python 3.6

Potential Solution

• Update foundation docker image
• Retest everything using python 3.8, locally & cloud
  • Live
  • Backtesting & Debugging
  • Research
  • Autocomplete
• Update documentation/readmes
• Stubs?

Reproducing the Problem

N/A

System Information

N/A

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

• [x] I have provided detailed steps to reproduce the issue