[webtransport] 各種更新（ Add headers constructor option and readonly response wt.responseHeaders 他

The quota exceeded error values can both be null
w3c/webtransport@25c0d4d

Switch to Uint8Array for exportKeyingMaterial
w3c/webtransport@c9349d5

Trailing whitespace is a plague
w3c/webtransport@cde4eb0

Maybe say that the exporter produces Uint8Array
w3c/webtransport@b5095e9

Use EnforceRange for the number type, not the attribute
w3c/webtransport@45b3a12

Merge branch 'main' into patch-1
w3c/webtransport@790ed8f

s/drained/starts draining/
w3c/webtransport@f07e5b9

Add headers constructor option and readonly response wt.responseHeaders
w3c/webtransport@7e213c4

s/headers/responseHeaders/ + apply forbidden request-header restrictions
w3c/webtransport@cdbd062

Author: triple-underscore