Update husky and let lint-staged fix ESLint issues (#3370)

The new version of husky makes it possible to simplify the pre-commit
hook a little.

And since prettier no longer takes care of the JavaScript files in our
project, it can no longer come into conflict with ESLint while running
lint-staged. Therefore we can activate the correction of ESLint issues
here.

.husky/pre-commit

@@ -1,7 +1,5 @@
 #!/bin/sh
 
-[ -f "$(dirname "$0")/_/husky.sh" ] && . "$(dirname "$0")/_/husky.sh"
-
 if command -v npm &> /dev/null; then
   npm run lint:staged
 fi