Unable to set custom headers to responses.
Tried to set custom headers:
```
ctx.set( 'Cross-Origin-Opener-Policy', 'same-origin' );
ctx.set( 'Cross-Origin-Embedder-Policy', 'require-corp' );
```

The changes weren't propagating to my response headers, is there a way to set custom headers like this?
Has anyone else tried to set these to access SharedBufferArray() object?