Update filestack version

Author: gabifija

filestack-rails-5.5.1.gem

@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
  s.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.md"]
 
  s.add_dependency 'rails', '>= 4.0'
- s.add_dependency "filestack", '~> 2.9', '>= 2.9.2'
+ s.add_dependency "filestack", '~> 2.9', '>= 2.9.3'
 
  s.add_development_dependency 'coveralls'
  s.add_development_dependency 'sqlite3', '~> 1.3', '>= 1.3.6'