Redmine 4.1 and conflict with the plugin "Additionals"

[ludekruz]

Hi,
we have a Redmine 4.1.3 with plugin "AlphaNodes/additionals" v3.0.3.
I've followed the installation procedure described in the README with setting to branch gemoji-4.0-native-emojis-no-images
Command "bundle install" in the plugin directory works fine.
Next command in redmine directory "rake emoji" get the following error:

$ rake emoji
You have requested:
  gemoji ~> 4.0.0.rc2

The bundle currently has gemoji locked at 3.0.1.
Try running `bundle update gemoji`

If you are updating multiple gems in your Gemfile at once,
try passing them all to `bundle update`
Run `bundle install` to install missing gems.

And the command "bundle install" or "bundle update" in the redmine diretory get the following error:

Resolving dependencies
Bundler could not find compatible versions for gem 'gemoji':
  In Gemfile:
    gemoji (~> 4.0.0.rc2)

    additionals was resolved to 3.0.3, which depends on
      gemoji (~> 3.0.0)