Merge pull request #5 from gol4ng/fixup

Fix forgotten signature

Merge pull request #4 from gol4ng/update

Update doc and emitter signature

Merge pull request #3 from gol4ng/prioritize-callback

Prioritized callback

Merge pull request #2 from gol4ng/gomod

add forgotten go.mod

Merge pull request #1 from gol4ng/improve-callback

⚠️ BC Break
RegisterCallback(stopCallbacks ...Callback) as move to RegisterCallbacks(stopCallbacks ...Callback)
new signature method RegisterCallback(stopCallback Callback) func()

Migration
if you use RegisterCallback(stopCallbacks ...Callback) just replace with RegisterCallbacks(stopCallbacks ...Callback)

Initial commit