fix form opal 1.2 opal-rails 2.0.x

Author: mpantel

ruby/hyperstack-config/lib/hyperstack/js_imports.rb

@@ -10,8 +10,8 @@ def js_import(value, client_only: nil, server_only: nil, defines:)
         return if (server_only && !on_server) || (client_only && on_server)
         puts "client js_import #{value}"
         defines.each do |name|
-          #puts "#{name}: #{`Opal.global[#{name}]`}"
-          next unless `Opal.global[#{name}] === undefined`
+          puts "#{name}" #": #{`Opal.global[#{name}]`}"
+          next unless `Opal.global['#{name}'] === undefined`
           raise "The package #{name} was not found. Add it to the webpack "\
                 "#{client_only ? 'client_only.js' : 'client_and_server.js'} manifest."
         end