update golog dependency

_examples/logging/json-logger/main.go

@@ -10,7 +10,9 @@ import (
 func main() {
 	app := iris.New()
 	app.Logger().SetLevel("debug")
-	app.Logger().Handle(golog.JSON("    ")) /* see below to manually create a handler */
+	app.Logger().SetFormat("json", "    ")
+	// to register a custom Formatter:
+	// app.Logger().RegisterFormatter(golog.Formatter...)
 
 	// Also, see app.Logger().SetLevelOutput(level string, w io.Writer)
 	// to set a custom writer for a specific level.
@@ -79,15 +81,3 @@ func ping(ctx iris.Context) {
 
 	ctx.WriteString("pong")
 }
-
-/* Manually. Use it for any custom format:
-func jsonOutput(l *golog.Log) bool {
-    // you can change the output to a file as well.
-	enc := json.NewEncoder(l.Logger.GetLevelOutput(l.Level.String()))
-	enc.SetIndent("", "    ")
-	err := enc.Encode(l)
-	return err == nil
-}
-
-app.Logger().Handle(jsonOutput)
-*/