Specify es2020 language target in tsconfig

tsconfig.json

@@ -3,13 +3,13 @@
     /* Visit https://aka.ms/tsconfig to read more about this file */
 
     /* Language and Environment */
-    "target": "es2022" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
-    // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
+    "target": "es2020" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
 
     /* Modules */
-    "module": "es2022" /* Specify what module code is generated. */,
-    "moduleResolution": "bundler" /* Specify how TypeScript looks up a file from a given module specifier. */,
-    // "customConditions": [],                           /* Conditions to set in addition to the resolver-specific defaults when resolving imports. */
+    "module": "commonjs" /* Specify what module code is generated. */,
+    "moduleResolution": "node" /* Specify how TypeScript looks up a file from a given module specifier. */,
+    "resolveJsonModule": true,
+    "esModuleInterop": true,
 
     /* Emit */
     "declaration": true /* Generate .d.ts files from TypeScript and JavaScript files in your project. */,
@@ -50,8 +50,18 @@
     }
   },
 
-  /* Internal-use: running example scripts */
+  /**
+   * Internal-use: running example scripts 
+   * We're mostly developing on es2022/Node 18+, but to extend that support a bit futher
+   * back our main compiler options are overridden when running with ts-node to use newer 
+   * syntax, eg. top-level await.
+   */
   "ts-node": {
-    "esm": true
+    "esm": true,
+    "compilerOptions": {
+      "target": "es2022",
+      "module": "es2022",
+      "moduleResolution": "bundler"
+    }
   }
 }