append to brotli compressed file

Is it possible to append data to a brotli compressed file such that it is compressed automatically?

The following would work, e.g. for gzip

```
$echo 'foo' | gzip >! test.gz
$echo 'foo' | gzip >> test.gz
zcat test
foo
foo
```

While the same approach would fail using `brotli` with

`corrupt input`