buffer: also alias BigUInt methods
These were overlooked in 5864fca7 because of the extra
Big
in the name. :)
Refs: https://github.com/nodejs/node/pull/34729
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