Add EventsType OktaWebApiOptions to enable DI support

[waynebrantley]

Describe the feature request?

OktaWebApiOptions is a custom class that ultimately gets mapped to asp.net JwtBearerOptions

This class is missing the EventTypes

This type is needed if any of the events need dependency injection. The Events type is constructed (with constructor injection) and used as a service by asp.net

.NET Version

standard 2.0

Provide a documentation link if applicable

No response

Additional Information?

The code change for this is very minimal and would be completely non-breaking and backwards compatible.
Simply add the EventsType property to the OktaWebApiOptions class and adjust the OpenIdConnectOptionsHelper to map it to the actual class that uses it.