Syntax and validation for struct.new_desc #28

Job	Run time
build-code-metadata-spec	2m 57s
build-legacy-exceptions-core-spec	3m 4s
build-core-spec	10m 19s
build-legacy-exceptions-js-api-spec	31s
build-js-api-spec	33s
build-web-api-spec	30s
build-spec-versions	8s
ensure-wasm-latest	0s
publish-spec	-1s
	18m 1s

Provide feedback