Update changelog

Fix tests specific to demo

Fix tests

Merge pull request saleor#4899 from korycins/fix/dont_anonymize_city_…

…and_postal_code

Do not anonymize city and postal_code

Move demo settings to separate file

Fix tests

Use example query in playground

Merge pull request saleor#4452 from NyanKiyoshi/middlewares/revert

Revert dynamic middleware loading

Merge pull request saleor#4448 from mirumee/update-demo

Update demo

Fix assertion to use anonymized email