Add support to Rails 7 and Ruby 3

[davidsilveira]

• set graphql dependency to rails 7
• update ruby version to version 3

[maartenesser]

Hi @davidsilveira,
Do you have an estimate on when this PR will be merged?

[davidsilveira]

Hi @davidsilveira, Do you have an estimate on when this PR will be merged?

Cc: @bricesanchez

[davidsilveira]

@maartenesser I'm using this code in a project already and haven't had any problems yet.
Gemfile:
gem 'graphql-auth', git: 'https://github.com/davidsilveira/graphql-auth.git', branch: 'rails-7'