Extend pageflow version requirement to < 16

Author: DanielKuhn

pageflow-before-after.gemspec

@@ -18,12 +18,12 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '~> 2.1'
 
-  spec.add_dependency 'pageflow', '~> 14.x'
+  spec.add_dependency 'pageflow', ['>= 14', '< 16']
   spec.add_dependency 'pageflow-public-i18n', '~> 1.8'
 
   spec.add_dependency 'jquery-ui-rails', '~> 5.0'
 
-  spec.add_development_dependency 'pageflow-support', '~> 14.x'
+  spec.add_development_dependency 'pageflow-support', ['>= 14', '< 16']
   spec.add_development_dependency 'rspec-rails', '~> 3.0'
 
   # Semantic versioning rake tasks