fix: make adapter-static fallback for Firebase Hosting explicit; upgr…

…ade some deps

According to the docs, it seems to be required now for SPA usage (default is undefined). adapter-static was also out-of-sync with the newest sveltekit. Vite upgrade is unrelated.

package.json

@@ -30,7 +30,7 @@
     "@firebase/rules-unit-testing": "^2.0.5",
     "@playwright/test": "^1.29.2",
     "@stripe/stripe-js": "^1.46.0",
-    "@sveltejs/adapter-static": "^1.0.0-next.48",
+    "@sveltejs/adapter-static": "^2.0.2",
     "@sveltejs/kit": "^1.22.3",
     "@tmcw/togeojson": "^5.5.0",
     "@turf/turf": "^6.5.0",
@@ -63,9 +63,9 @@
     "svg-inline-loader": "^0.8.2",
     "tslib": "^2.3.1",
     "typescript": "^5.0.0",
-    "vite": "^4.0.4",
+    "vite": "^4.4.7",
     "vite-bundle-visualizer": "0.6.0",
-    "vitest": "^0.28.2"
+    "vitest": "^0.33.0"
   },
   "type": "module",
   "packageManager": "yarn@3.5.0"

svelte.config.js

@@ -1,4 +1,5 @@
-import adapter from '@sveltejs/adapter-static'; // https://www.npmjs.com/package/@sveltejs/adapter-static
+// https://kit.svelte.dev/docs/adapter-static
+import adapter from '@sveltejs/adapter-static';
 
 import preprocess from 'svelte-preprocess';
 
@@ -16,7 +17,8 @@ const config = {
     },
     adapter: adapter({
       pages: 'dist',
-      assets: 'dist'
+      assets: 'dist',
+      fallback: 'index.html'
     }),
 
     prerender: {