Dependency tree not resolved with Rails 6.1.4

[theoo]

When looking at the branches, it seems that some effort were made to bring it to rails 6.

While trying to installing along rails 6.1.4 I get the following error:

Bundler could not find compatible versions for gem "rails":
  In snapshot (Gemfile.lock):
    rails (= 6.1.4)

  In Gemfile:
    rails (~> 6.1.4) x86_64-linux

    gdpr_rails x86_64-linux was resolved to 0.2.1, which depends on
      rails (~> 5.1.4)

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.

However it seems that the last gem available in the directory is 0.5.1.
Trying to load 0.5.2 from this repo won't help much:

Bundler could not find compatible versions for gem "rubyzip":
  In snapshot (Gemfile.lock):
    rubyzip (= 2.3.2)

  In Gemfile:
    gdpr_rails (~> 0.5.2) x86_64-linux was resolved to 0.5.2, which depends on
      rubyzip (>= 1.0.0, < 2)

    selenium-webdriver x86_64-linux was resolved to 3.142.7, which depends on
      rubyzip (>= 1.2.2) x86_64-linux

    webdrivers x86_64-linux was resolved to 4.6.0, which depends on
      rubyzip (>= 1.3.0) x86_64-linux

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.

Do you have any plan to bring it to rails 6.1?
Thanks for your shared work.