Add default metadata when calling log with string level and message (#1712)

Author: txgruppi

lib/winston/logger.js

@@ -220,7 +220,9 @@ class Logger extends Transform {
         return this;
       }
 
-      this.write({ [LEVEL]: level, level, message: msg });
+      msg = { [LEVEL]: level, level, message: msg };
+      this._addDefaultMeta(msg);
+      this.write(msg);
       return this;
     }