updating versions in intergration tests

Author: Shiva Shankar Vaddepally

.github/workflows/test.yml

@@ -115,8 +115,8 @@ jobs:
         python-version:
           - 3.11
         netscaler-version:
-          - 13.1-49.15
-          - 14.1-4.42
+          - 13.1-59.19
+          - 14.1-43.50
     steps:
       - name: Checkout the repo
         uses: actions/checkout@v4