build: update to use esm for tsc.

Codex- · Codex- · commit 297f9c87f343 · 2022-05-28T13:07:39.000+12:00
diff --git a/tsconfig.json b/tsconfig.json
@@ -1,14 +1,15 @@
 {
   "compilerOptions": {
-    "target": "es2019",
-    "module": "commonjs",
+    "target": "es2021",
+    "module": "esnext",
     "noEmit": true,
 
     "outDir": "lib",
     "rootDir": "src",
 
     "esModuleInterop": true,
     "isolatedModules": true,
+    "moduleResolution": "node",
     "noImplicitAny": true,
     "strict": true
   },
