fix: instead of updating the golden files on each run, actually test.
fix: instead of updating the golden files on each run, actually test.

This seems to have snuck in somehow, which is rather unfortunate but sort of
expected given the code change. Changed to make it harder to accidentally commit
a change that effectively disables testing.

lucidsoftware/tsickle,ncfxy/tsickle,ncfxy/tsickle,drjanitor/tsickle,angular/tsickle,drjanitor/tsickle,hess-g/tsickle,ncfxy/tsickle,drjanitor/tsickle,lucidsoftware/tsickle,alexeagle/tsickle,angular/tsickle,drjanitor/tsickle,lucidsoftware/tsickle,alexeagle/tsickle,hess-g/tsickle,alexeagle/tsickle