Make 'event' field in EventContext public

[liuwb]

type EventContext struct {
event map[string]any
resourceContext map[string]any
}

Both 'event' and 'resourceContext' are private fields that cannot be accessed in Factory method. Please make them public.

[cloudshiftchris]

Thanks for noting that; it's been addressed in v0.2.1

[liuwb]

Thanks for noting that; it's been addressed in v0.2.1

Readme sample code should also be updated accordingly.