[webrtc-insertable-streams] SFrameTransfor.setEncryptionKey cannot be set all possible keyID values (#69)

youennf has just created a new issue for https://github.com/w3c/webrtc-insertable-streams:

== SFrameTransfor.setEncryptionKey cannot be set all possible keyID values ==
As per SFrame, keyID can be 64 bits.
But unsigned long long is only mapping precisely up to 53 bits, as per https://heycam.github.io/webidl/#abstract-opdef-converttoint.

One possibility is to use a BigInt in lieu, or in addition maybe.
In that case values above max<unsigned long long> could trigger a RangeError.

Please view or discuss this issue at https://github.com/w3c/webrtc-insertable-streams/issues/69 using your GitHub account


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