CI: run worker tests first to give enough time to download the required scripts (#1550)

This should fix issues with Safari 13 not managing to load the worker in BrowserStack Automate.

test/unittests.js

@@ -55,8 +55,8 @@ describe('Unit Tests', function () {
     });
   }
 
+  require('./worker')();
   require('./crypto')();
   require('./general')();
-  require('./worker')();
   require('./security')();
 });