feat: http2 support

Author: niftylettuce

index.js

@@ -1,6 +1,5 @@
 const http = require('http');
-const https = require('https');
-// const http2 = require('http2');
+const http2 = require('http2');
 const util = require('util');
 
 const Cabin = require('cabin');
@@ -160,8 +159,7 @@ class API {
 
     // start server on either http or https
     if (this.config.protocol === 'https')
-      server = https.createServer(this.config.ssl, app.callback());
-    // server = http2.createSecureServer(this.config.ssl, app.callback());
+      server = http2.createSecureServer(this.config.ssl, app.callback());
     else server = http.createServer(app.callback());
 
     // expose app, server, client