Try to fix the github CI to install bigdecimal for the jruby 9.1

round.

.github/workflows/ruby.yml

@@ -29,6 +29,10 @@ jobs:
       # Still seems to be an issue in jruby-9.1, but not 9.2
       # https://github.community/t/conditional-setting-of-env-variables-in-gh-actions/179650
 
+    - name: Set up bigdecimal for jruby 9.1
+      run: gem install bigdecimal -v '1.4.4' --source 'https://rubygems.org/'
+      if: ${{ matrix.ruby == 'jruby-9.1' }}
+
     - name: Install dependencies
       run: bundle install --jobs 4 --retry 3
     - name: Run tests

traject.gemspec

@@ -38,9 +38,4 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rake"
   spec.add_development_dependency "minitest"
   spec.add_development_dependency "rspec-mocks", '~> 3.4'
-
-  # Old versions of jruby need to require bigdecimal
-  if RUBY_VERSION =~ /jruby/i
-    spec.add_dependency 'bigdecimal', '= 1.4.4'
-  end
 end