Shadow color for 'is-danger' inputs

[antimatter96]

If we apply a is-danger class to an input then on focus is leads to a black shadow around a red border

[antimatter96]

I propose the following addition

.is-danger:focus{
   box-shadow: 0 0 0 0.2rem rgba(232, 86, 0, .15);
}

leading to

[picturepan2]

I will fix it soon. Thank you.

[picturepan2]

@antimatter96 Fixed in #155 for both success and danger focus colors. Thank you.

[picturepan2]

Ah wait. I will fix that bug with form-select in next version.