feat(Poll): add Duration field

structs.go

@@ -2337,12 +2337,16 @@ type PollResults struct {
 type Poll struct {
  Question PollMedia `json:"question"`
  Answers []PollAnswer `json:"answers"`
- Expiry time.Time `json:"expiry"`
  AllowMultiselect bool `json:"allow_multiselect"`
  LayoutType PollLayoutType `json:"layout_type"`
 
+ // NOTE: should be set only on creation, when fetching use Expiry.
+ Duration int `json:"duration"`
+
  // NOTE: available only when fetching.
+
  Results *PollResults `json:"results,omitempty"`
+ Expiry *time.Time `json:"expiry,omitempty"`
 }
 
 // Constants for the different bit offsets of text channel permissions