use COMPDUMPFILE variable as completion dump file location

[wonmin82]

I have slightly changed antigen-apply() function to use $COMPDUMPFILE variable as completion dump file location.

I have tested it, I think it works well. Is there any problem that this code could cause?

[wonmin82]

This code could resolve #97.

[desyncr]

Tested and seems to work just fine. 👍

[pedromaltez]

Thanks for looking into this! It was killing me that I was setting the variable but nothing was happening.

[sharat87]

Implementation looks good to me, but should we add an ANTIGEN_ prefix to the variable name? It will be both explicit in intent and will avoid potential future conflicts with other projects.

Thank you for the PR and sorry for the delay :)

[wonmin82]

Agreed. I've added prefix to the variable name. Thank you for the review.

[wonmin82]

Can anyone merge this PR? If there is no problem..

[desyncr]

I don't think there are repo collaborators who can merge PRs and @sharat87 has been away for a while.

[desyncr]

We may have to update the README.md or wiki to document the new configuration variable.
Thanks @wonmin82 for these changes.