Update to Svelte 4 and bump other dependencies

Dockerfile

@@ -4,7 +4,7 @@ FROM node:22-alpine AS build
 WORKDIR /app
 
 COPY package.json .
-RUN npm install --legacy-peer-deps
+RUN npm install
 
 COPY . .
 RUN npm run build

package.json

@@ -6,27 +6,25 @@
 		"build": "vite build",
 		"package": "svelte-kit package",
 		"preview": "vite preview",
-		"prepare": "svelte-kit sync",
-		"check": "svelte-check --tsconfig ./tsconfig.json",
-		"check:watch": "svelte-check --tsconfig ./tsconfig.json --watch"
+		"prepare": "svelte-kit sync"
 	},
 	"devDependencies": {
 		"@jimmyverburgt/svelte-input-otp": "^0.0.3",
-		"@paypal/paypal-js": "^5.1.4",
-		"@sveltejs/adapter-node": "^1.1.0",
-		"@sveltejs/kit": "^1.0.7",
-		"mdsvex": "^0.10.6",
-		"postcss": "^8.4.21",
+		"@paypal/paypal-js": "^5.1.6",
+		"@sveltejs/adapter-node": "^5.2.8",
+		"@sveltejs/kit": "^2.7.2",
+		"@sveltejs/vite-plugin-svelte": "^3.1.2",
+		"mdsvex": "^0.12.3",
+		"postcss": "^8.4.47",
 		"postcss-import": "^15.1.0",
-		"svelte": "^3.55.0",
-		"svelte-check": "^3.0.1",
-		"svelte-preprocess": "^5.0.0",
-		"svelte-turnstile": "^0.5.0",
+		"svelte": "^4.2.19",
+		"svelte-preprocess": "^6.0.3",
+		"svelte-turnstile": "^0.5.1",
 		"svelte-use-click-outside": "^1.0.0",
-		"tslib": "^2.4.1",
-		"typescript": "^4.9.4",
-		"unist-util-visit": "^4.1.1",
-		"vite": "4.0.5"
+		"tslib": "^2.8.0",
+		"typescript": "^5.6.3",
+		"unist-util-visit": "^4.1.2",
+		"vite": "^5.4.9"
 	},
 	"type": "module"
 }

svelte.config.js

@@ -1,5 +1,5 @@
 import adapter from "@sveltejs/adapter-node";
-import preprocess from "svelte-preprocess";
+import { sveltePreprocess } from "svelte-preprocess";
 import atImport from "postcss-import";
 import { mdsvex } from "mdsvex";
 import { markdown } from "./src/lib/markdown.js";
@@ -11,7 +11,7 @@ const config = {
 	extensions: [ ".svelte", ".md" ],
 
 	preprocess: [
-		preprocess({
+		sveltePreprocess({
 			postcss: {
 				plugins: [
 					atImport({

tsconfig.json

@@ -1,17 +1,8 @@
 {
 	"extends": "./.svelte-kit/tsconfig.json",
-	"compilerOptions": {
-		"allowJs": true,
-		"checkJs": true,
-		"esModuleInterop": true,
-		"forceConsistentCasingInFileNames": true,
-		"resolveJsonModule": true,
-		"skipLibCheck": true,
-		"sourceMap": true,
-		"strict": true,
-		"paths": {
-			"$lib": ["./src/lib"],
-			"$lib/*": ["./src/lib/*"]
-		}
-	}
-}
+    "compilerOptions": {
+        "allowJs": false,
+        "forceConsistentCasingInFileNames": true,
+        "strict": true
+    }
+}