fix: add dependencies to gemspec

nexus_cqrs.gemspec

@@ -17,4 +17,7 @@ Gem::Specification.new do |spec|
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
+  spec.add_dependency 'generator_spec'
+  spec.add_dependency 'thread_safe'
+  spec.add_dependency 'ibsciss-middleware'
 end