Revert "Now that we're TS, move back to commonjs for jest"

This reverts commit 8b6c858611.

data/lib/index.ts

@@ -3,6 +3,8 @@ import path from 'path';
 import { fileURLToPath } from 'url';
 import fs from 'fs';
 
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
 const libdir = path.join(__dirname, "../..");
 
 export type Type = {

tsconfig-base.json

@@ -3,7 +3,7 @@
         "incremental": true,
         "target": "es2020",
         "lib": ["es2020"],
-        "module": "commonjs",
+        "module": "esnext",
         "jsx": "react",
         "strict": true,
         "moduleResolution": "node",