Select number value when a user begins typing while the dropdown is open

While this library is fantastic for words, when dropdown has numbers as the dropdown values and the user types a number value to search for it, the dropdown does not highlight that number.

e.g. in a dropdown list of birth years [2004... 1932], when the dropdown is open and the user types "1984", that value is not highlighted.

The reason for this may be addressed elsewhere, but wanted to file an issue to ask for clarification on this.