update: modify rubocop installation in CI workflow and remove it from development dependencies

Author: FarhanAnjum-opti

.github/workflows/ruby.yml

@@ -33,11 +33,16 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true
-    - name: Install rubocop 1.78.0 for Ruby 3.0.0
-      if: matrix.ruby == '3.0.0'
+    - name: Install rubocop conditionally based on Ruby version
       run: |
-        echo "Installing rubocop 1.78.0 for Ruby 3.0.0"
-        gem install rubocop -v 1.78.0
+        echo "Ruby version: ${{ matrix.ruby }}"
+        if [[ "${{ matrix.ruby }}" == "3.0.0" ]]; then
+          echo "Installing rubocop 1.78.0 for Ruby 3.0.0"
+          gem install rubocop -v 1.78.0
+        else
+          echo "Installing latest rubocop"
+          gem install rubocop
+        fi
     - name: Run linting
       run: |
         bundle exec rubocop

optimizely-sdk.gemspec

@@ -25,7 +25,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'coveralls_reborn'
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'rspec'
-  spec.add_development_dependency 'rubocop'
   spec.add_development_dependency 'webmock'
 
   spec.add_runtime_dependency 'json-schema', '>= 2.6'