All those explicit dependencies have been removed in the past because create react app pulls them in. With this change, you add them twice. What exactly was the idea/problem?

I wanted to remove eslint from global requirements (globally installed package) to local. When I did this and tried to run yarn lint I got lot's of errors about missed packages.

eslint is installed locally, see:

$ cd ponferrada
$ git checkout master
$ yarn install
$ ls -lA node_modules/.bin/eslint
lrwxr-xr-x  1 me  staff  50 17 Feb 16:03 node_modules/.bin/eslint -> ../addons-linter/node_modules/eslint/bin/eslint.js
$ ./node_modules/.bin/eslint --version
v5.16.0
$ yarn eslint --version
yarn run v1.22.0
$ /projects/ponferrada/node_modules/.bin/eslint --version
v5.16.0
✨  Done in 0.76s.

The only question for me is why this is not yet eslint 6 ....

hmm. weird. Let me check again. I am always have troubles with eslint for some reason :(

But uninstalling the global version is probably a good idea to avoid confusion

Hmm, eslint 5 is installed via mozilla/web-ext and mozilla/addons-linter, which still uses eslint 5. But so far this did not make problems.