* Fix issues with POSIX::Spawn, Terrapin and Ruby 3.0

Also improve the Terrapin monkey-patch for the stderr/stdout issue.

* Fix keyword argument handling throughout the codebase

* Monkey-patch Paperclip to fix keyword arguments handling in validators

* Change validation_extensions to please CodeClimate

* Bump microformats from 4.2.1 to 4.3.1

* Allow Ruby 3.0

* Add Ruby 3.0 test target to CircleCI

* Add test for admin dashboard warnings

* Fix admin dashboard warnings on Ruby 3.0

* Drop dependency on secure_headers, use always_write_cookie instead

* Fix cookies in Tor Hidden Services by moving configuration to application.rb

* Instead of setting always_write_cookie at boot, monkey-patch ActionDispatch

* Enable secure cookie flag for https only

* Disable force_ssl for .onion hosts only

Co-authored-by: Aiden McClelland <me@drbonez.dev>

CSFR-prevention is already implemented but adding this doesn't hurt.

A brief introduction to Same-Site cookies (and the difference between strict and
lax) can be found at
https://blog.mozilla.org/security/2018/04/24/same-site-cookies-in-firefox-60/

TLDR: We use lax since we want the cookies to be sent when the user navigates
safely from an external site.

add permissive CORS to API controllers