Update to stable Socket v1.15.0 release

Author: clue

composer.json

@@ -17,7 +17,7 @@
         "react/event-loop": "^1.2",
         "react/promise": "^3 || ^2.0 || ^1.1",
         "react/promise-timer": "^1.10",
-        "react/socket": "dev-cancel-happy as 1.15.0"
+        "react/socket": "^1.15"
     },
     "require-dev": {
         "phpstan/phpstan": "1.10.15 || 1.4.10",
@@ -29,11 +29,5 @@
     },
     "autoload-dev": {
         "psr-4": { "Clue\\Tests\\React\\Redis\\": "tests/" }
-    },
-    "repositories": {
-        "clue": {
-            "type": "vcs",
-            "url": "https://github.com/clue-labs/socket"
-        }
     }
 }