feat: simplify logging functions

__*BREAKING CHANGE*__

Log functions no longer require a message string in the first argument, this means
reporters that used to tap into `extra` for the spread arguments you will now
find this in the `messages` array.

```diff
- const reporter: Reporter = ({ name, level, message, extra, ...rest })
+ const reporter: Reporter = ({ name, level, messages, ...rest })
..
-   console.log({ message, extra });
+   const message = messages.shift();
+   console.log({ message, extra: messages });
```

fixes: #14