Update TypeScript target and module to ES2022 in configuration files

Since we are already relying on ES2022 features like `Array.prototype.at`.

client-api/tsconfig.json

@@ -1,7 +1,7 @@
 {
     "compilerOptions": {
-        "target": "es2020",
-        "module": "es2020",
+        "target": "es2022",
+        "module": "es2022",
         "moduleResolution": "node",
         
         "verbatimModuleSyntax": true,

client-api/tsup.config.ts

@@ -8,7 +8,7 @@ export default defineConfig({
   clean: true,
   treeshake: true,
   minify: false,
-  target: 'es2020',
+  target: 'es2022',
   esbuildOptions(options) {
     options.external = [
       ...options.external || [],

client/tsconfig.json

@@ -1,8 +1,8 @@
 {
     "extends": "@vue/tsconfig/tsconfig.json",
     "compilerOptions": {
-        "target": "es2020",
-        "module": "es2020",
+        "target": "es2022",
+        "module": "es2022",
         "moduleResolution": "Bundler",
 
         "verbatimModuleSyntax": true,