Some of the helper classes are missing prefix in the pre-built alternative of "Prefixed" version

[alexchanwk]

This is about Bulma.

Overview of the problem

This is about the Bulma CSS framework
I'm using Bulma Prefixed [1.0.0]

Description

I am loving the prefixed pre-built version of Bulma 1.0.0. However, there are problems when using some of the typography and spacing helper classes (E.g., is-size-*, py-*) which are not working when the "bulma-" prefix is added.

Steps to Reproduce

When the following title is created, the text size (bulma-is-size-*) and padding (bulma-py-5-*) helpers has no effect.

<div class="bulma-title bulma-has-text-primary bulma-is-size-1 bulma-py-5">Bulma</div>

It only works after removing the prefix from those helper classes

<div class="bulma-title bulma-has-text-primary is-size-1 py-5">Bulma</div>

Expected behavior

For consistency, I would love the ability to use the spacing and size classes also with prefix. Thanks!