No way of handling the 'error' event in busboy

[chadhakunal]

Hi team, There is no way of handling busboy's error event currently which is leading to global exceptions in express whenever a malformed body is passed

Eg: If I pass \n instead of \r\n, an error is thrown

• Valid Request:

curl -k '<path>' \
  -H 'Content-Type: multipart/form-data; boundary=----WebKitFormBoundary76aZhgZIDJfqZd9S' \
  -H 'Accept: application/json, text/plain, */*' \
  --data-raw $'------WebKitFormBoundary76aZhgZIDJfqZd9S\r\nContent-Disposition: form-data; name="file"; filename="img1.jpg"\r\nContent-Type: image/jpeg\r\n\r\n\r\n------WebKitFormBoundary76aZhgZIDJfqZd9S--\r\n' \
  --compressed

• Invalid Request:

curl -k '<path>' \
  -H 'Content-Type: multipart/form-data; boundary=----WebKitFormBoundary76aZhgZIDJfqZd9S' \
  -H 'Accept: application/json, text/plain, */*' \
  --data-raw $'------WebKitFormBoundary76aZhgZIDJfqZd9S\nContent-Disposition: form-data; name="file"; filename="img1.jpg"\nContent-Type: image/jpeg\n\n\n------WebKitFormBoundary76aZhgZIDJfqZd9S--\n' \
  --compressed

Would it be possible to expose the error event in express busboy?