Fix WebAssembly externs
Fix WebAssembly externs

WebAssembly.RuntimeError takes three optional params:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/RuntimeError/RuntimeError

WebAssembly.instantiateStreaming can take a response as well as promise
of one:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/instantiateStreaming#parameters

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