Closing square bracket in JSON export

[Mramorov]

Hello,
In the file 'json.go' responsible for json export, you open the file with the 'O_APPEND ' flag, so the closing square bracket instead of the last comma is not written to the file and this error is not processed.

[musabgultekin]

If you use json exporter, you need to close the exports chan in order last closing square bracked is processed.

If you mean This line https://github.com/geziyor/geziyor/blob/master/export/json.go#L73 It's a write error so even if we try to write the last square bracked I don't think we can get it successfully as it got file write error already.

What do you suggest for changing?