Is your request related to a problem?

Tweak box heading styles - MarkBind/vue-strap#118
Problem faced: It is difficult to use a one size fits all style to introduce the new heading sections.

Describe the solution you'd like
We can

1. Patch bootswatch as a scoped package, and extend its stylesheets directly
2. or introduce an additional layer of theme specific stylesheets to be included in the build process, based on the current theme being used.

I personally prefer option 1 in the long run ( e.g. for #782 ), but it likely requires tinkering with the build process to integrate ( bootswatch uses some scss ).

Otherwise, option 2 can serve as a good interim solution.

Describe alternatives you've considered

1. Fork bootswatch instead, following the existing process used for vue-strap to update the dist as needed. This is likely more maintainence-heavy.