Remove sudo: false from .travis.yml (#847)
Remove sudo: false from .travis.yml (#847)

According to the blog post it's deprecated and should be removed.
I don't think it matters one way or the other to us so away it goes.

Fixes: https://github.com/nodejs/nan/issues/846
Refs: https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration
nodejs/nan,nodejs/nan,nodejs/nan,nodejs/nan