Upgrade to Jekyll 4

[ckingbailey]

We are on Jekyll 3.8.7. We have security alerts on dependencies of Jekyll 3. We need to upgrade to Jekyll 4 to be able to install patched versions of the vulnerable dependencies.

I've looked into this a bit, and it seems like it's going to take some work. Here is an article about migrating from to v3 to v4.

Several of the Jekyll plugins we use, such as jekyll-assets, are not supported on v4. I read that Jekyll should build SCSS without the need for a plugin, but when I tried make serve on v4, I got a fairly unhelpful error message. Perhaps we are using outdated SCSS syntax in that file?

  /Users/ckingbailey/Projects/personal/odca-jekyll/assets/odca.scss 2:9                                 root stylesheet
  Conversion error: Jekyll::Converters::Scss encountered an error while converting 'assets/odca.scss':
                    Expected ".