handling big integers about pbf HOT 4 CLOSED

Now that Node.js 10.4+ supports BigInt any chance of revisiting support for this? I'm working with a 3rd party service that unfortunately using int64 to send IDs which doesn't work well trying to stuff into a 32 bit JavaScript int.

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I'm not sure... I would probably use something like https://github.com/indutny/bn.js to handle big numbers, but I wouldn't want to pull in such a big dependency for a rare use case like this. Perhaps we could do away with just mentioning this in docs and providing a JS workaround in a gist?

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Out of scope for this library for now, keeping it simple.

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In order to be backward compatible, it might be worth looking at:
https://developers.google.com/protocol-buffers/docs/reference/java/com/google/protobuf/DescriptorProtos.FieldOptions.JSType

JS_NORMAL would be the current behavior.
JS_NUMBER would parse and return the number as a bigint.
JS_STRING would parse and return as a string

The way compiler would need to make calls to the new functions writeVarintFromBigint / writeVarintFromString / readVarintFromBigint / readVarintFromString.

writeVarintFromString and readVarintFromString could be implemented by calling the Bigint variant and doing a toString value of it.

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