Bootstrap: Add `justify-self` to flex utilities

[ocarreterom]

Could be useful to have a justify-self utility in the same way that align-self.

https://github.com/twbs/bootstrap/blob/e57a2f244ba8446fffe71847e6a58b18f7b2d541/scss/utilities/_flex.scss#L44-L49

[MartijnCuppens]

Hi @ocarreterom,
I don't know if this is really necessary, you can use the margin utility classes to achieve this.

[derhintergrund]

@MartijnCuppens is right.

Plus it won´t work on flexbox items:

In flexbox layouts, this property is ignored (more about alignment in Flexbox)

MDN Web Docs

But you can use the margin utility classes to position items horizontal.

[mdo]

Skipping on this then, thanks y'all!

[Arturace]

Would be nice to have this in v5, considering the more common use of css-grid. But from what I saw, v5 doesn't do anything with css-grid, so it might not have any value for the framework.