Fix JS Builds on Windows

MANIFEST.in

@@ -1,2 +1,2 @@
-recursive-include src/django_idom/static/ *
-recursive-include src/django_idom/templates/ *.html
+recursive-include src/django_idom/static *
+recursive-include src/django_idom/templates *.html

setup.py

@@ -119,6 +119,15 @@ def run(self):
                 npm = shutil.which("npm")  # this is required on windows
                 if npm is None:
                     raise RuntimeError("NPM is not installed.")
+
+                # Required when using NPM >3
+                log.info(f"> Installing rollup, react, and react-dom")
+                subprocess.run(f"{npm} install rollup".split(), cwd=js_dir, check=True)
+                subprocess.run(f"{npm} install react".split(), cwd=js_dir, check=True)
+                subprocess.run(
+                    f"{npm} install react-dom".split(), cwd=js_dir, check=True
+                )
+
                 for args in (f"{npm} install", f"{npm} run build"):
                     args_list = args.split()
                     log.info(f"> {list2cmdline(args_list)}")