Use String.prototype.replaceAll in sourcemap removal script

Summary: Apply suggestion from D48605129 to have access to "modern" `replaceAll`.

Reviewed By: lblasa

Differential Revision: D48642120

fbshipit-source-id: 1e273fe5590e7b4a48c9176ef5f1afdab688b7d6

desktop/plugins/public/reactdevtools/scripts/remove-sourcemap-reference.tsx

@@ -22,14 +22,6 @@ import path from 'path';
 const SOURCEMAP_REFERENCE =
   '//# sourceMappingURL=importFile.worker.worker.js.map';
 
-// Remove this once we're upgrade to a newer JS version. String.prototype.replaceAll is a thing.
-function replaceAll(s: string, find: string, replace: string): string {
-  return s.replace(
-    new RegExp(find.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&'), 'g'),
-    replace,
-  );
-}
-
 async function main() {
   const frontendPath = path.resolve(
     __dirname,
@@ -48,10 +40,7 @@ async function main() {
     return 0;
   }
 
-  await fs.writeFile(
+  await fs.writeFile(frontendPath, content.replaceAll(SOURCEMAP_REFERENCE, ''));
-    frontendPath,
-    replaceAll(content, SOURCEMAP_REFERENCE, ''),
-  );
 
   console.log('react-devtools-inline patched successfully.');
   return 0;

desktop/plugins/public/reactdevtools/scripts/tsconfig.json

@@ -1,6 +1,6 @@
 {
   "compilerOptions": {
-    "target": "ES2017",
+    "target": "ES2021",
     "module": "nodenext",
     "jsx": "react",
     "noEmit": true,
@@ -9,4 +9,3 @@
     "esModuleInterop": true
   }
 }
-