Compatibility with Firefox v78/ESR #4561

It was bumped here https://github.com/sindresorhus/refined-github/pull/4361 for a selector change. May want to consider rolling it back for ESR support, otherwise, using an older version will still work.

Supporting older releases would likely mean having to set up postcss and Babel to ensure that they are not continuously broken since none of us uses them.

However they probably still wouldn’t work because often older version contain webextension-related bugs that we just don’t expect while writing anymore.

My suggestion, however not easy, would be to keep a fork that includes these adjustments and then deal with the breakage that might happen over time.

For reference, here's the Firefox release schedule: https://wiki.mozilla.org/Release_Management/Calendar

I just realized that postcss/babel can't fix the changes brought in #4361. Supporting ESR would mean we have to keep its compatibility in mind instead of just testing on the last version of browsers.

Officially we won't test/support ESR, but if any developer uses ESR, they can open PRs and take care of that compatibility themselves, as long as they're small changes and they're doing the testing themselves. I'm going to close this for this reason, but PRs welcome.