add spdy agent

index.js

@@ -18,6 +18,7 @@ const createErrorClass = require('create-error-class');
 const nodeStatusCodes = require('node-status-codes');
 const isPlainObj = require('is-plain-obj');
 const isRetryAllowed = require('is-retry-allowed');
+const spdy = require('spdy');
 
 function requestAsEventEmitter(opts) {
 	opts = opts || {};
@@ -267,6 +268,13 @@ function normalizeArguments(url, opts) {
 		};
 	}
 
+	if (opts.agent === undefined) {
+		opts.agent = spdy.createAgent({
+			host: opts.host,
+			port: opts.port
+		});
+	}
+
 	return opts;
 }
 

package.json

@@ -54,6 +54,7 @@
     "is-stream": "^1.0.0",
     "lowercase-keys": "^1.0.0",
     "node-status-codes": "^2.0.0",
+    "spdy": "^3.2.0",
     "timed-out": "^2.0.0",
     "unzip-response": "^1.0.0",
     "url-parse-lax": "^1.0.0"