[v6.x backport] Eslint 4.1.0
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
Backport of the first two of the four commits in https://github.com/nodejs/node/pull/13895