v2020.3.1

Changes:

• 7a288b8 Bump to 2020.3.1 release (#354)
• 63e2a70 Add single simulation auto enable to C++ (#353)
• 0bc1eda Update API version to work with autostart feature (#352)
• 0742d7e Add setting for selecting a default extension. (#349)
• 0a10f65 Update WPILib API publish version (#351)
• c2cb044 Add new API properties for #349. (#350)

This list of changes was auto generated.