CLI-979: Consolidate update-check logic

Author: danepowell

composer.json

@@ -11,6 +11,12 @@
         }
     ],
     "minimum-stability": "dev",
+    "repositories": [
+        {
+            "type": "path",
+            "url": "../../consolidation/self-update"
+        }
+    ],
     "require": {
         "php": "^8.1",
         "ext-json": "*",