Use CLI for bundling

[hirasso]

Description

• Switch to @swup/cli for bundling
• Correctly separate dependencies from dev dependencies
• Includes version bump and changelog update

Drive-By

• Code cleanup, more readable logging

Checks

• [x] The PR is submitted to the master branch
• [x] The code was linted before pushing (npm run lint)

[hirasso]

@daun Ready :)