Omitempty prevents setting replace_original to false

[wojtkiewicz]

What happened

At the moment it's impossible to send replace_original: false in WebhookMessage because of omitempty.
This would be fine if replace_original was set to false by default. Unfortunately it's not.

Expected behavior

It should be possible to set replace_original: false from slack-go.

Steps to reproduce

import (
	"encoding/json"
	"fmt"
)

type WebhookMessage struct {
	ReplaceOriginal bool `json:"replace_original,omitempty"`
}

func main() {
        msg := &WebhookMessage{
		ReplaceOriginal: false,
	}
	out, _ := json.Marshal(msg)
	fmt.Println(string(out))
}

// produces {}

Versions

• Go: any
• slack-go/slack: 0.10.3

[kanata2]

Resolved by #1122