ISTWCMS-2266: Update composer.json - remove cas and add saml

composer.json

@@ -26,8 +26,6 @@
         "drupal/autocomplete_deluxe": "dev-8.x-1.x",
         "drupal/cancel_button": "1.0",
         "drupal/captcha": "dev-8.x-1.x",
-        "drupal/cas": "dev-8.x-1.x",
-        "drupal/cas_attributes": "dev-8.x-1.x",
         "drupal/coder": "8.2.12",
         "drupal/components": "1.0",
         "drupal/config_update": "dev-8.x-1.x",
@@ -57,6 +55,7 @@
         "drupal/paragraphs": "dev-8.x-1.x",
         "drupal/paragraphs_edit": "2.0-alpha4",
         "drupal/recaptcha": "dev-8.x-1.x",
+        "drupal/samlauth": "dev-8.x-2.x",
         "drupal/search_kint": "dev-8.x-1.x",
         "drupal/simplify_menu": "dev-8.x-1.x",
         "drupal/token": "dev-8.x-1.x",