safari not loading wasm

[gedw99]

convert to Issue if needed

#413

[samlown]

This looks to be more of a configuration issue with the test site and JS, as the regular build.gobl.org site, which uses the wasm, is working correctly.

We don't have resources just at the moment to investigate this more, but would be happy to receive any PRs!

[gedw99]

it’s only on safari and only works on 3rd refresh so it’s hard to pin down why it’s happening …

if I work it out will def make a PR .