Bulma V1.0.0 disabled is-outlined button bug

[merubird]

This is about Bulma.

Overview of the problem

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

Description

if I use a disabled button in the style is-outlined is displayed wrong:

Steps to Reproduce

<button class="button is-danger is-outlined" disabled="">Outlined </button>

[tonprince]

I have the same problem, the disabled is-outlined button has a wrong text color so the label is invisible.

[tonprince]

I created a PR.

#3773