Declare support for Active Admin 1.2-

Author: tkalliom

activeadmin-globalize.gemspec

@@ -15,7 +15,7 @@ Gem::Specification.new do |s|
 
   s.files = Dir['{app,config,db,lib}/**/*'] + %w(MIT-LICENSE README.md)
 
-  s.add_dependency 'activeadmin', '>= 1.0', '< 1.2'
+  s.add_dependency 'activeadmin', '>= 1.0', '< 2.0'
   # Try to support rails from 3.2 up to 4.2.x
   s.add_dependency 'globalize', '>= 3.1.0', '< 6.0'