Merge branch 'cachex-test' into 'develop'

Test framework overhaul (speed, reliability)

See merge request pleroma/pleroma!3209

diff --cc config/config.exs
Simple merge

diff --cc lib/pleroma/user.ex
Simple merge

diff --cc mix.exs
Simple merge

diff --cc mix.lock
Simple merge

diff --cc test/mix/tasks/pleroma/database_test.exs
Simple merge

diff --cc test/pleroma/emails/user_email_test.exs
Simple merge

diff --cc test/pleroma/web/twitter_api/twitter_api_test.exs
Simple merge

diff --cc test/pleroma/web/web_finger_test.exs
Simple merge

diff --cc test/pleroma/workers/cron/new_users_digest_worker_test.exs
Simple merge