MNT: Update HTTP client

Author: chrispenny

composer.json

@@ -21,7 +21,7 @@
         "silverstripe/framework": "^6",
         "silverstripe/reports": "^6",
         "silverstripe/silverstripe-forager": "2.0.2",
-        "silverstripe/silverstripe-search-client-php": "0.0.7-alpha",
+        "silverstripe/silverstripe-search-client-php": "dev-feature/api-1-4-support as 0.0.7-alpha",
         "guzzlehttp/guzzle": "^7.9"
     },
     "require-dev": {