Allow sub-theme to alter breakpoints of base theme

Based on this issue announcing support for the Breakpoints module (https://www.drupal.org/node/2319215), I thought custom breakpoints for my Bootstrap subtheme (CDN based) would be as simple as installing the Breakpoints module and adding the custom breakpoints to my .info file as directed. However, even though I've confirmed that Breakpoints module has read my custom breakpoints correctly, this doesn't seem to have any effect on Bootstrap's breakpoints.

Presumably when you say Breakpoints module is supported, you mean the subtheme .info file can define custom breakpoints for other modules? I thought it meant that Drupal Bootstrap would use the breakpoints defined in Breakpoints.

If we can't override Drupal Bootstrap's built-in breakpoints using the Breakpoints module, and there doesn't seem to be any way to get a different compile of the Bootstrap CSS and JS from the CDN, what is the expected way to change the breakpoints that the Drupal theme uses?

I've looked through the documentation and searched for references to breakpoints in the code, and not found anything. In non-Drupal bootstrap obviously it's easy, you just compile a different version.

To be clear, I want to simply change the min/max width pixel values for xs, sm, md, and lg, not define any completely new breakpoints.