Build/test against Ruby 3.0

We've been passing translate options in a way which is not compatible
with Ruby 3. This led to the following error:

    ActionView::Template::Error: wrong number of arguments (given 2, expected 1)

Ruby 3 interprets keyword arguments vs. hashes differently. The I18n
source code has a comment which shows the correct expected usage:

  https://github.com/ruby-i18n/i18n/blob/v1.8.10/lib/i18n.rb#L181-L194

Removing the {} causes the arguments to be sent correctly.

Note that Ruby 3 is not expected to work with Rails 5.2:

  rails/rails#40938 (comment)

.travis.yml

@@ -4,9 +4,16 @@ script: bundle exec rake test
 rvm:
   - 2.6.7
   - 2.7.3
+  - 3.0.1
 gemfile:
   - gemfiles/rails_5.gemfile
   - gemfiles/rails_6.gemfile
+
+matrix:
+  exclude:
+    - rvm: 3.0.1
+      gemfile: gemfiles/rails_5.gemfile
+
 addons:
   code_climate:
     repo_token:

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ### Next release
 
+Other
+- Build and test against Ruby 3.0
+
 Bug fixes
 - Regression: within an Engine, always look for Pundit policies in the engine (https://github.com/varvet/godmin/pull/259)
 

app/views/godmin/resource/_pagination.html.erb

@@ -27,14 +27,14 @@
 </div>
 <div class="pagination-entries pull-right hidden-xs">
   <% if @resources.length == 0 %>
-    <%= translate_scoped("pagination.entries.zero", {
+    <%= translate_scoped("pagination.entries.zero",
       resource: @resource_class.model_name.human(count: @resources.length).downcase
-    }) %>
+    ) %>
   <% else %>
-    <%= translate_scoped("pagination.entries.other", {
+    <%= translate_scoped("pagination.entries.other",
       resource: @resource_class.model_name.human(count: @resources.length).downcase,
       count: @resources.length,
       total: @resource_service.paginator.total_resources
-    }) %>
+    ) %>
   <% end %>
 </div>