[JS] Better BigInt compatibility check

[asfimport]

See: apache/arrow#9110

Check for whether BigInt64ArrayAvailable and BigUint64ArrayAvailable are available, rather than just BigIntAvailable. Recent versions of JavaScriptCore/WebKit in Safari support BigInt but do not support BigInt64Array, and so anything that relies on BigInt64Array will fail despite BigIntAvailable being true.

The manifestation of this issue can be seen when trying to run the following within Safari on a table that contains bigints:

RecordBatchJSONWriter.writeAll(table).toString(true)

message: "BigUint64Array is not available in this environment"
  BigUint64ArrayUnavailableError
  BigUint64ArrayUnavailable
  bignumToString
  bigNumsToStrings
  generatorResume@[native code]
  performIteration@[native code]
  visitInt
  visit
  map@[native code]
  recordBatchToJSON
  close
  finish
  global code

See also: https://bugs.webkit.org/show_bug.cgi?id=190800

Reporter: Diana Clarke / @dianaclarke

PRs and other links:

• GitHub Pull Request apache/arrow#9110

_{Note: This issue was originally created as ARROW-11706. Please see the migration documentation for further details.}

[asfimport]

Dominik Moritz / @domoritz:
I think this can be closed, no?