Fix tailing logs stops working after sometimes

[anhpt379]

prometheus-nginx-log-exporter stopped tailing logs on many of my servers
after sometimes and needed a manual restart to start working again.

I couldn't able to reproduce it, but as suggested here,
switching from inotify (default) to poll might help to fix the issue.

Also in a similar nginx log exporter, they're using Poll: true as well.

[anhpt379]

I found out that this issue was fixed in hpcloud/tail#99, but the hpcloud/tail version we're using (v1.0.0 - the latest release) doesn't have that commit yet

[anhpt379]

Updated the PR with updating hpcloud/tail version only

[tdevelioglu]

Hi Anh, lgtm. Could you also mention in the commit message why the change to fsnotify was made ?

[anhpt379]

just updated as requested. fsnotify was changed because I ran go mod tidy to update indirect dependencies

[tdevelioglu]

Thanks!