Update 0.4.0

Hey! All changes from 0.4.0-preview updates are now in the main branch.

These include:

• Creating blanks
• New dice shapes
  • Round D4
  • Chamfered D4
• Chamfered/filleted edges
• An option to add an underscore to a number
• Some SVG import/export bugfixes caused by system locale.

Cheers!