Upgrade to Typescript 5.x and Svelte 4.x

Author: patricknelson

.eslintrc.js

@@ -36,7 +36,7 @@ module.exports = {
   settings: {
     'import/resolver': {
       node: {
-        extensions: ['.ts']
+        extensions: ['.ts', '.d.ts']
       }
     }
   }