Package Upgrades

[travis-r6s]

This upgrades all dependencies in package.json, and fixes two issues that came up as a result:

• yaml.safeLoad has been replaced by yaml.load
• Algolia SSR mixins have been renamed

[hjvedvik]

This looks very good, @thetre97. Thanks! One thing I noticed in the build log is that webpack-node-externals has changed the whitelistoption to allowlist. Would be nice if you can change it here :)

[travis-r6s]

Ah, good catch! Done

[travis-r6s]

I'll take a look at the next build error now as well 😏

[travis-r6s]

@hjvedvik I kept getting this error Could not generate HTML for "__plugins_id": TypeError: Cannot read property 'propsData' of undefined unless I removed the serverPrefetch function. It seems to work fine without it, but was it needed for something previously, presumably prefetching search results at build time?