fix fastProxy options reference

Author: jkyberneees

lib/proxy-factory.js

@@ -7,7 +7,7 @@ module.exports = ({ proxyType, opts, route }) => {
     proxy = fastProxy({
       base: opts.targetOverride || route.target,
       http2: !!route.http2,
-      ...(opts.fastProxy)
+      ...(route.fastProxy)
     }).proxy
   } else if (proxyType === 'lambda') {
     proxy = require('http-lambda-proxy')({