Update solidus_support requirement

Flickwerk patch support is only present from 0.13.1.

Author: mamhoff

solidus_braintree.gemspec

@@ -34,7 +34,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'solidus_api', ['>= 3.4.0.dev', '< 5']
   spec.add_dependency 'solidus_backend', ['>= 3.4.0.dev', '< 5']
   spec.add_dependency 'solidus_core', ['>= 3.4.0.dev', '< 5']
-  spec.add_dependency 'solidus_support', ['>= 0.11', '< 1']
+  spec.add_dependency 'solidus_support', ['>= 0.13.1', '< 1']
 
   spec.add_development_dependency 'rails-controller-testing'
   spec.add_development_dependency 'solidus_dev_support', '~> 2.5'