feat: update slack-go dependency

vendor/github.com/slack-go/slack/socketmode/log.go

@@ -0,0 +1,51 @@
+package socketmode
+
+import "fmt"
+
+// TODO merge logger, ilogger, and internalLogger with the top-level package's equivalents
+
+// logger is a logger interface compatible with both stdlib and some
+// 3rd party loggers.
+type logger interface {
+	Output(int, string) error
+}
+
+// ilogger represents the internal logging api we use.
+type ilogger interface {
+	logger
+	Print(...interface{})
+	Printf(string, ...interface{})
+	Println(...interface{})
+}
+
+// internalLog implements the additional methods used by our internal logging.
+type internalLog struct {
+	logger
+}
+
+// Println replicates the behaviour of the standard logger.
+func (t internalLog) Println(v ...interface{}) {
+	t.Output(2, fmt.Sprintln(v...))
+}
+
+// Printf replicates the behaviour of the standard logger.
+func (t internalLog) Printf(format string, v ...interface{}) {
+	t.Output(2, fmt.Sprintf(format, v...))
+}
+
+// Print replicates the behaviour of the standard logger.
+func (t internalLog) Print(v ...interface{}) {
+	t.Output(2, fmt.Sprint(v...))
+}
+
+func (smc *Client) Debugf(format string, v ...interface{}) {
+	if smc.debug {
+		smc.log.Output(2, fmt.Sprintf(format, v...))
+	}
+}
+
+func (smc *Client) Debugln(v ...interface{}) {
+	if smc.debug {
+		smc.log.Output(2, fmt.Sprintln(v...))
+	}
+}