Feature: FieldProps format/parse - access to meta object

Currently `FieldProps.format` and `FieldProps.parse` do not receive `meta`. It would be handy, if they would, so you can take into accout the meta, like in this example:

```js
{
if (meta.active) {
return value;
}
// return parsed
}}
format={(value, {meta}) => {
if (meta.active) {
return value;
}
// return formatted
}}
/>
```

Or whatever meta information one would want to take into account. Currently there is an option `FieldProps.formatOnBlur` , but you already notice, there is no `FieldProps.parseOnBlur`. Introducing an option for each case is maybe the wrong approach. Like in the example above, you would not even need the `formatOnBlur` option and would allow for other use cases, you might not have think of.