Missing OpenFeature Events types.

[thomaspoignant]

As of today, the SDK can emit those events:

• ProviderNotReady
• ProviderReady
• ProviderError
• ProviderStale

As mentioned in this page, OpenFeature is supporting more events and we are missing:

• PROVIDER_CONFIGURATION_CHANGED
• PROVIDER_RECONCILING
• PROVIDER_CONTEXT_CHANGED

Specification page about events is available here.

A good reference to understand the eventing in the client side is this blog post from @toddbaert