message: refactor(dev-infra): convert nullish coalescing operator to plain javascript
  low version nodejs doesn't support nullish coalescing operator very well
  PR Close
diff: @@ -68,7 +68,8 @@ const captureNgDevPatches = (files, patches) =>
  patches.forEach(p => _captureNgDevPatch(p[0], p[1], files));
  const _captureNgDevPatch = (search, replace, files) => {
  for (const fileName of files) {
  - const currentPatches = ngDevPatches.get(fileName) ?? [];
  + const patches = ngDevPatches.get(fileName);
  + const currentPatches = (patches !== null && patches !== undefined) ? patches : [];
  ngDevPatches.set(fileName, [...currentPatches, [search, replace]]);
  }
  };
  