Update vendor for next release (#1343)

1 files changed, 9 insertions, 0 deletions

diff --git a/vendor/github.com/slack-go/slack/internal/errorsx/errorsx.go b/vendor/github.com/slack-go/slack/internal/errorsx/errorsx.go
index cb850577..0182ec68 100644
--- a/vendor/github.com/slack-go/slack/internal/errorsx/errorsx.go
+++ b/vendor/github.com/slack-go/slack/internal/errorsx/errorsx.go
@@ -6,3 +6,12 @@ type String string
 func (t String) Error() string {
 	return string(t)
 }
+
+// Is reports whether String matches with the target error
+func (t String) Is(target error) bool {
+	if target == nil {
+		return false
+	}
+
+	return t.Error() == target.Error()
+}