Upgrade "next" to enable its https_proxy support

[n3y]

Feature

Hello. More recent versions of the "next" module support https_proxy, without which the app produces errors like "Failed to fetch `Fira Mono` from Google Fonts." in environments without direct internet access.

• https://github.com/vercel/next.js/issues/45034
• https://github.com/vercel/next.js/pull/46822
• should enable to fix #330 behind a proxy

$ diff .package.json.original package.json
39c39
<     "next": "13.2.3",
---
>     "next": "13.4.6",

Alternative solutions or implementations

No response

Other context

No response