test: use common.crashOnUnhandledRejection()

add common.crashOnUnhandledRejectio to
test-http2-window-size.js

PR-URL: #17227
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: IvanWei

test/parallel/test-http2-window-size.js

@@ -10,6 +10,7 @@ if (!common.hasCrypto)
   common.skip('missing crypto');
 const assert = require('assert');
 const h2 = require('http2');
+common.crashOnUnhandledRejection();
 
 // Given a list of buffers and an initial window size, have a server write
 // each buffer to the HTTP2 Writable stream, and let the client verify that