Deprecated jQuery pseudo selectors and on() event handler

Question

Right now, I've seen, that some pseudo selectors are deprecated as of jQuery 3.4, for example the :last selector. Currently, I'm using these selectors to attach event handlers, like:

$('#my-table').on('click', '.btn:last', function (e) {
    // ...
});

I need this style of event handling, because I'm adding rows dynamically on runtime and don't want to add a separate event handler for each row that is added.

Documentation states, that I should use last() instead of :last now. But how to use this in on() handlers like above?