fix: make event emit public

[danielwpz]

No description provided.

[austinabell]

ah, yes, this is very valid. Do you mind updating the test case in https://github.com/near/near-sdk-rs/blob/master/near-sdk/tests/event_tests.rs to make sure we don't remove this in the future?

sth like:

mod private {
    use super::*;
    
    #[near_bindgen(event_json(standard = "another_standard"))]
    pub enum AnotherEvent {
        #[event_version("1.0.0")]
        Test,
    }
}

...

private::AnotherEvent::Test.emit()

which fails on current master.

If not, nbd, I'll pull in later today or tomorrow and do myself

[danielwpz]

@austinabell sure, will do!

[austinabell]

thanks for the contribution!