/deep/, >>>, and ::ng-deep will be deprecated. Any alternative?

As docs say /deep/, >>>, and ::ng-deep will be deprecated, so what's the alternative?

Here is the problem:
I have a component.

<app-mycomp>
    <h2>Some Text...</h2>
</app-mycomp>

mycomp.component.html:

<div class="title">
    <ng-content></ng-content>
</div>

I need to style h2 in mycomp.component.css (not in other files)

h2{ margin: 0px;}

But it is not working because of encapsulation, so I used ::ng-deep:

::ng-deep h2{margin: 0px;}

but the docs say ::ng-deep will be deprecated. what's the alternative?

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