Merge branch 'leipert-enable-prefer-object-spread' into 'master'

Enable prefer-object-spread in eslint

Closes #202172

See merge request gitlab-org/gitlab!31438

.eslintrc.yml

@@ -45,8 +45,6 @@ rules:
   no-jquery/no-serialize: error
   promise/always-return: off
   promise/no-callback-in-promise: off
-  # Make update to eslint@6 smoother:
-  prefer-object-spread: off
 overrides:
   - files:
       - '**/spec/**/*'