Merge pull request #4818 from nebulab/kennyadsl/fix-frontend-dependency-dev-master

Be explicit about the solidus_frontend gemspec dependency

Author: kennyadsl

solidus.gemspec

@@ -24,6 +24,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'solidus_api', s.version
   s.add_dependency 'solidus_backend', s.version
   s.add_dependency 'solidus_core', s.version
-  s.add_dependency 'solidus_frontend', s.version
   s.add_dependency 'solidus_sample', s.version
+
+  s.add_dependency 'solidus_frontend', '~> 3.3.0.alpha'
 end