Have `npm run build-dist` _always_ recreate `dist`

[paulo-ferraz-oliveira]

Description

So we don't get keep files we no longer need. I wanted to have pushed this with #246 but I didn't push the local commit 😄

• [x] I have performed a self-review of my changes
• [x] I have read and understood the contributing guidelines

[paulo-ferraz-oliveira]

No hurry on this one. 😄