Merge branch 'fix/credo-issues-test' into 'develop'

.credo.exs

test/formatter_test.exs

test/notification_test.exs

test/object_test.exs

test/support/builders/user_builder.ex

test/tasks/relay_test.exs

test/tasks/user_test.exs

test/user_test.exs

test/web/activity_pub/activity_pub_controller_test.exs

test/web/activity_pub/activity_pub_test.exs

test/web/admin_api/admin_api_controller_test.exs

test/web/common_api/common_api_utils_test.exs

test/web/federator_test.exs

test/web/mastodon_api/mastodon_api_controller_test.exs

test/web/mastodon_api/status_view_test.exs

test/web/oauth/authorization_test.exs

test/web/oauth/oauth_controller_test.exs

test/web/oauth/token_test.exs

test/web/ostatus/activity_representer_test.exs

test/web/ostatus/feed_representer_test.exs