Add missing status codes to logs (#830)

* Add missing status codes on logs

* Use range

* Add missing then

src/amber/pipes/logger.cr

@@ -51,12 +51,13 @@ module Amber
 
       private def http_status(status)
         case status
-        when 200
-          text = "200 ".colorize(:green)
-        when 404
-          text = "404 ".colorize(:red)
+        when 200..299 then status.colorize(:green)
+        when 300..399 then status.colorize(:blue)
+        when 400..499 then status.colorize(:yellow)
+        when 500..599 then status.colorize(:red)
+        else
+          status.colorize(:white)
         end
-        "#{text}"
       end
 
       private def elapsed_text(elapsed)