chore: karma single run in CI env

Author: Kamil Kisiela

karma.conf.js

@@ -83,7 +83,7 @@ module.exports = function (config) {
 
         // Continuous Integration mode
         // if true, Karma captures browsers, runs the tests and exits
-        singleRun: true
+        singleRun: ciEnv
     };
     config.set(_config);
 };