napi: add bigint support
Checklist
/cc @nodejs/n-api passing a bigint to a napi function still throws Invalid argument
and i can't figure out why.
/cc @nodejs/v8 should we block on this until we have a way to get values from bigint?
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines