`pushLog` argument serializer

[mxab]

Description

Currently the args array for the pushLog function maps each arg to a string.

{
...
  message: args
    .map((arg) => {
      try {
        return String(arg);
      } catch (err) {
        return '';
      }
    })
    .join(' '),
}

This works but makes logs ugly as soon as someone write console.log("something happened" , {foo: "bar"}) as it yields something happened [object Object]

Proposed solution

Extend the config with a LogMessageSerializer which is used instead of the hard coded String(arg);.

{
...
  message: args
    .map((arg) => {
      return config.logMessageSerializer.serialize(arg)
    })
    .join(' '),
}

Use current behaviour as a default StringLogMessageSerializer in the config but it could be overwritten with a e.g. JSONLogMessageSerializer that would do something like JSON.stringify(arg)