Feature Request

What is the desired behavior?

To have lte and gte responsive selectors along with existing lt and gt.

What is the use-case or motivation for the desired behavior?

It's minor detail, but in order to cover all screen sizes it would be nicer to be able to write something like this:
<div ngClass.lte-sm="example-mobile-class" ngClass.gt-sm="example-desktop-class">
than this:
<div ngClass.lt-md="example-mobile-class" ngClass.gt-sm="example-desktop-class"> .

Is there anything else we should know?

I could try to tackle it myself and make a PR if you agree it makes sense to implement this.