Append to the end of the file

[fancywriter]

Hello!

I don't see an ability to append to the bottom of existing file (similar to echo "aaa" >> bbb.txt), will be useful for applications which want to write to the same file, but has to be restarted sometimes.

Current monix.nio.file.appendAsync requires startPosition, which one has to know from somewhere, can it be done to "end of file" automatically?