Why does it seem I have to hold cell for a few seconds for 'didSelectItemAt' to trigger?

## Expected Behavior
Hello, first of all I will say I am loving everything so far and thank you for all this. I am also very new to swift :)

I am trying to get it so that when I tap a column header, it performs the sort action. I want to be able to quickly tap it to activate it.

This is the same for body cells as well, but it seems its a little less time before they highlight themselves.

## Actual Behavior
I have to hold down the column header in order to activate the didSelectItemAt method.

## Steps to Reproduce the Problem

1. Quickly tap a column header - no response.
2. Hold down column header for 2-3 seconds - response.

## Specifications

- Xcode version: 9.2
- iOS version: 12.0
- Dependency manager + version: CocoaPods 1.2.0

Thanks!