Use https to download packages

[dirkschumacher]

I noticed that some wasm assets are downloaded using http instead of https. This should fix it unless there is a specific reason of course to use http.

[gadenbuie]

Thanks! I checked with George and this was likely just a small typo. We'll have to do a bit of work to get the tests back in order, though, so we can take it from here. Thanks again!

[georgestagg]

Thanks!