Fix NPM tests

[Goooler]

No description provided.

[nedtwigg]

@simschla no action required, just an FYI. The xo style is behaving differently on dev machines vs CI. I'm not 100% sure what's happening, but I think it's something to do with version pinning. We put a fair amount of time into fixing it, but eventually just resorted to disabling / removing the xo tests. The js stuff still have plenty of coverage, keeping all the version of the js packages up to date would be a massive ongoing burden. So again, no action needed, just wanted to let you know.