test: remove `require('buffer')` on 4 test files
- test/parallel/test-buffer-fakes.js
- test/parallel/test-buffer-includes.js
- test/parallel/test-buffer-indexof.js
- test/parallel/test-buffer-new.js
Refs: https://github.com/nodejs/node/issues/13836
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines
Affected core subsystem(s)
test, buffer