✨ Improve with proxy scripts

[momocow]

Features

• ✨ Add a new option, ~hotDev~ proxyScript.
• ✨ Add a new template variable, basename.
• ✨ Add a new template variable buildTime.
• ✨ Add settings for generating download and update URLs.
• ✨ Add a new template variable, filename.

Fixes

• 🐛 fix header provider may return undefined.

[inazuma-bot]

:tada: This PR is included in version 2.4.0 :tada:

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

Your semantic-release bot :package::rocket: