Update to node20

- updates many dependencies
- removes @nuxtjs/tailwindcss and postcss8
- pkg targets are using node18 until node20 targets are available

.devcontainer/Dockerfile

@@ -1,5 +1,5 @@
 # [Choice] Node.js version (use -bullseye variants on local arm64/Apple Silicon): 18, 16, 14, 18-bullseye, 16-bullseye, 14-bullseye, 18-buster, 16-buster, 14-buster
-ARG VARIANT=16
+ARG VARIANT=20
 FROM mcr.microsoft.com/devcontainers/javascript-node:0-${VARIANT} as base
 
 # Setup the node environment

.devcontainer/devcontainer.json

@@ -8,7 +8,7 @@
 		// Append -bullseye or -buster to pin to an OS version.
 		// Use -bullseye variants on local arm64/Apple Silicon.
 		"args": {
-			"VARIANT": "16"
+			"VARIANT": "20"
 		}
 	},
 	"mounts": [