Update dependencies (#1929)

vendor/github.com/slack-go/slack/dialog_text.go

@@ -18,7 +18,7 @@ const (
 )
 
 // TextInputElement subtype of DialogInput
-//	https://api.slack.com/dialogs#option_element_attributes#text_element_attributes
+// https://api.slack.com/dialogs#option_element_attributes#text_element_attributes
 type TextInputElement struct {
 	DialogInput
 	MaxLength int              `json:"max_length,omitempty"`

vendor/github.com/slack-go/slack/files.go

@@ -299,7 +299,7 @@ func (api *Client) UploadFile(params FileUploadParameters) (file *File, err erro
 func (api *Client) UploadFileContext(ctx context.Context, params FileUploadParameters) (file *File, err error) {
 	// Test if user token is valid. This helps because client.Do doesn't like this for some reason. XXX: More
 	// investigation needed, but for now this will do.
-	_, err = api.AuthTest()
+	_, err = api.AuthTestContext(ctx)
 	if err != nil {
 		return nil, err
 	}

vendor/github.com/slack-go/slack/info.go

@@ -409,6 +409,11 @@ func (t JSONTime) Time() time.Time {
 func (t *JSONTime) UnmarshalJSON(buf []byte) error {
 	s := bytes.Trim(buf, `"`)
 
+	if bytes.EqualFold(s, []byte("null")) {
+		*t = JSONTime(0)
+		return nil
+	}
+
 	v, err := strconv.Atoi(string(s))
 	if err != nil {
 		return err

vendor/github.com/slack-go/slack/internal/backoff/backoff.go

@@ -51,7 +51,7 @@ func (b *Backoff) Duration() (dur time.Duration) {
 	return dur
 }
 
-//Resets the current value of the counter back to Min
+// Resets the current value of the counter back to Min
 func (b *Backoff) Reset() {
 	b.attempts = 0
 }

vendor/github.com/slack-go/slack/misc.go

@@ -50,7 +50,7 @@ type SlackErrorResponse struct {
 
 func (r SlackErrorResponse) Error() string { return r.Err }
 
-// RateLimitedError represents the rate limit respond from slack
+// RateLimitedError represents the rate limit response from slack
 type RateLimitedError struct {
 	RetryAfter time.Duration
 }

vendor/github.com/slack-go/slack/stars.go

@@ -130,17 +130,18 @@ func (api *Client) ListStarsContext(ctx context.Context, params StarsParameters)
 // GetStarred returns a list of StarredItem items.
 //
 // The user then has to iterate over them and figure out what they should
-// be looking at according to what is in the Type.
-//    for _, item := range items {
-//        switch c.Type {
-//        case "file_comment":
-//            log.Println(c.Comment)
-//        case "file":
-//             ...
+// be looking at according to what is in the Type:
+//
+//	for _, item := range items {
+//	    switch c.Type {
+//	    case "file_comment":
+//	        log.Println(c.Comment)
+//	    case "file":
+//	        ...
+//	}
 //
-//    }
 // This function still exists to maintain backwards compatibility.
-// I exposed it as returning []StarredItem, so it shall stay as StarredItem
+// I exposed it as returning []StarredItem, so it shall stay as StarredItem.
 func (api *Client) GetStarred(params StarsParameters) ([]StarredItem, *Paging, error) {
 	return api.GetStarredContext(context.Background(), params)
 }