next_method_linter(), first rule: don't pass '...'

[MichaelChirico]

I've just run into this highly vexing issue, which apparently has been trapping folks deep in the S3 weeds for quite some time 😃

https://stat.ethz.ch/pipermail/r-devel/2012-October/065016.html

As noted, passing ... to NextMethod() is almost surely not what you want, and we can easily look for that statically.

We might also consider enforcing "no positional arguments":

https://bugs.r-project.org/show_bug.cgi?id=15654