Merge pull request #3 from SyncfusionExamples/917873-AngTreeSecurity

917873: resolve dependabot issue.

Author: sabari-senthamaraikannan

package.json

@@ -33,7 +33,7 @@
     "codelyzer": "^6.0.0",
     "jasmine-core": "~3.6.0",
     "jasmine-spec-reporter": "~5.0.0",
-    "karma": "~6.1.0",
+    "karma": "6.3.16",
     "karma-chrome-launcher": "~3.1.0",
     "karma-coverage": "~2.0.3",
     "karma-jasmine": "~4.0.0",