Fix mas list output for installed spec

The output that was being asserted against wasn't correct and lead to it
failing the validation included in 32b0f47.

In order to assert against the actual output, the version number and ID
has been added.

spec/mac_app_store_dumper_spec.rb

@@ -40,7 +40,7 @@
     before do
       Bundle::MacAppStoreDumper.reset!
       allow(Bundle).to receive(:mas_installed?).and_return(true)
-      allow(Bundle::MacAppStoreDumper).to receive(:`).and_return("123 foo\n456 bar\n789 baz")
+      allow(Bundle::MacAppStoreDumper).to receive(:`).and_return("123 foo (1.0)\n456 bar (2.0)\n789 baz (3.0)")
     end
     subject { Bundle::MacAppStoreDumper }