Incompatible with rack 3.1

[keithlayne]

In 3.1, rackup moved to a separate gem, so the server breaks on this line:

https://github.com/testdouble/cypress-rails/blob/main/lib/cypress-rails/server/puma.rb#L13

Rack::Handler is undefined in this case, but I confirmed changing that line to Rackup::Handler worked.

I don't know how or if you want to deal with this, from a quick look it appears that cypress-rails doesn't have an explicit dependency on rack.

Sorry, I don't have time to really look into this right now, for the moment I've just locked rack to 3.0, but wanted to let you know about it.

[krzysztofjablonski]

I've created a PR #163 based on code from capybara: https://github.com/teamcapybara/capybara/blob/master/lib/capybara/registrations/servers.rb#L31

[rosston]

This should be fixed in 0.7.1 thanks to the PR from @krzysztofjablonski!