10.3 “Чести своей не отдам никому”

In Autoprefixer 10.3 @lukewarlow added ::file-selector-button support.

::-webkit-file-upload-button {
  border: 2px solid #6c5ce7;
  padding: .2em .4em;
  border-radius: .2em;
  background-color: #a29bfe;
}

::file-selector-button {
  border: 2px solid #6c5ce7;
  padding: .2em .4em;
  border-radius: .2em;
  background-color: #a29bfe;
}