ref(uptime): Switch request_headers to a array of tuples (#334)

Author: evanpurkhiser

examples/uptime-configs/1/example-post.msgpack

@@ -1 +1 @@
-��subscription_id� d7629c6c82be4f679ee78a0d977856d2�url�http://sentry.io�interval_seconds�
,�timeout_ms�
��request_method�POST�request_headers��Authorization�Bearer 12345�Content-Type�application/json�X-My-Custom-Header�example value�request_body�{"key": "value"}
+��subscription_id� d7629c6c82be4f679ee78a0d977856d2�url�http://sentry.io�interval_seconds�
,�timeout_ms�
��request_method�POST�request_headers���Authorization�Bearer 12345��Content-Type�application/json��X-My-Custom-Header�example value�request_body�{"key": "value"}

schemas/uptime-configs.v1.schema.json

@@ -9,6 +9,21 @@
       "type": "number",
       "enum": [60, 300, 600, 1200, 1800, 3600]
     },
+    "RequestHeader": {
+      "title": "request_header",
+      "description": "An individual header, consisting of a name and value as a tuple.",
+      "type": "array",
+      "prefixItems": [
+        {
+          "title": "header_name",
+          "type": "string"
+        },
+        {
+          "title": "header_value",
+          "type": "string"
+        }
+      ]
+    },
     "CheckConfig": {
       "title": "check_config",
       "description": "A message containing the configuration for a check to scheduled and executed by the uptime-checker.",
@@ -37,9 +52,9 @@
         },
         "request_headers": {
           "description": "Additional HTTP headers to send with the request",
-          "type": "object",
-          "additionalProperties": {
-            "type": "string"
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/RequestHeader"
           }
         },
         "request_body": {