refactor: use :scheme for request URL's scheme if it's HTTP/2

Author: usualoma

src/request.ts

@@ -190,10 +190,11 @@ export const newRequest = (
   }
   const url = new URL(
     `${
-      incoming instanceof Http2ServerRequest ||
-      (incoming.socket && (incoming.socket as TLSSocket).encrypted)
-        ? 'https'
-        : 'http'
+      incoming instanceof Http2ServerRequest
+        ? incoming.scheme
+        : incoming.socket && (incoming.socket as TLSSocket).encrypted
+          ? 'https'
+          : 'http'
     }://${host}${incomingUrl}`
   )