Adding 'methods' property to HTTP trigger schema

Author: fabiocav

schemas/json/function.json

@@ -227,6 +227,24 @@
                         "admin"
                     ],
                     "description": "The function HTTP authorization level."
+                },
+                "methods":{
+                    "type":"array",
+                    "items": [
+                        {
+                            "type": "string",
+                            "enum": [
+                                "get",
+                                "post",
+                                "delete",
+                                "head",
+                                "patch",
+                                "put",
+                                "options",
+                                "trace"
+                            ]
+                        }
+                    ]
                 }
             },
             "allOf": [