Updates composer support for guzzle 7.2

Author: tc-mccarthy

composer.json

@@ -1,20 +1,18 @@
 {
-    "name": "newsdaycom/stackpath-php-sdk",
-    "description": "A PHP SDK for Stackpath",
-    "type": "library",
-    "require": {  
-        "guzzlehttp/guzzle": "^6.3"
-    },
-    "license": "MIT",
-    "authors": [
-        {
-            "name": "TC McCarthy",
-            "email": "[email protected]"
-        }
-    ],
-    "autoload": {
-      "psr-0": {
-        "StackPath": "src/"
-      }
+  "name": "newsdaycom/stackpath-php-sdk",
+  "description": "A PHP SDK for Stackpath",
+  "type": "library",
+  "require": {
+    "guzzlehttp/guzzle": "^6.3 || ^7.2"
+  },
+  "license": "MIT",
+  "authors": [{
+    "name": "TC McCarthy",
+    "email": "[email protected]"
+  }],
+  "autoload": {
+    "psr-0": {
+      "StackPath": "src/"
     }
-}
+  }
+}