feat: gestures should allow for listening on both x and y axes

# Bug Report

**Ionic version:**
**5.2.1**

**Current behavior:**
I have created a custom gesture to reproduice "swipe" vertical and horizontal.
However I have direction x or y but what about x and y ?
If I choose "x" I have to move on x-axis before y-axis to have a move on y-axis..

**Expected behavior:**
I would like a x and y move...

**Steps to reproduce:**
Create a custom gesture with a direction x.

const gesture = this.gesture.create({
el: card.nativeElement,
direction: "y",
gestureName: 'swipe',

Thank you