Update vendor (mattermost)

vendor/github.com/mattermost/platform/model/command_response.go

@@ -5,6 +5,7 @@ package model
 
 import (
 	"encoding/json"
+	"fmt"
 	"io"
 )
 
@@ -14,12 +15,12 @@ const (
 )
 
 type CommandResponse struct {
-	ResponseType string      `json:"response_type"`
-	Text         string      `json:"text"`
-	Username     string      `json:"username"`
-	IconURL      string      `json:"icon_url"`
-	GotoLocation string      `json:"goto_location"`
-	Attachments  interface{} `json:"attachments"`
+	ResponseType string             `json:"response_type"`
+	Text         string             `json:"text"`
+	Username     string             `json:"username"`
+	IconURL      string             `json:"icon_url"`
+	GotoLocation string             `json:"goto_location"`
+	Attachments  []*SlackAttachment `json:"attachments"`
 }
 
 func (o *CommandResponse) ToJson() string {
@@ -34,10 +35,19 @@ func (o *CommandResponse) ToJson() string {
 func CommandResponseFromJson(data io.Reader) *CommandResponse {
 	decoder := json.NewDecoder(data)
 	var o CommandResponse
-	err := decoder.Decode(&o)
-	if err == nil {
-		return &o
-	} else {
+
+	if err := decoder.Decode(&o); err != nil {
 		return nil
 	}
+
+	// Ensure attachment fields are stored as strings
+	for _, attachment := range o.Attachments {
+		for _, field := range attachment.Fields {
+			if field.Value != nil {
+				field.Value = fmt.Sprintf("%v", field.Value)
+			}
+		}
+	}
+
+	return &o
 }