fix(@schematics/angular): set restartOnFileChange to true in karma.conf templates

Fix angular#13542

Author: confraria

packages/schematics/angular/application/files/root/karma.conf.js.template

@@ -26,6 +26,7 @@ module.exports = function (config) {
     logLevel: config.LOG_INFO,
     autoWatch: true,
     browsers: ['Chrome'],
-    singleRun: false
+    singleRun: false,
+    restartOnFileChange: true
   });
 };

packages/schematics/angular/library/files/__projectRoot__/karma.conf.js.template

@@ -26,6 +26,7 @@ module.exports = function (config) {
     logLevel: config.LOG_INFO,
     autoWatch: true,
     browsers: ['Chrome'],
-    singleRun: false
+    singleRun: false,
+    restartOnFileChange: true
   });
 };