Create custom async downloader for HLS streams

tests/test_download.py

@@ -0,0 +1,23 @@
+import os
+import time
+from pprint import pprint
+
+from streamrip.downloadtools import DownloadPool
+
+
+def test_downloadpool(tmpdir):
+    start = time.perf_counter()
+    with DownloadPool(
+        (
+            f"https://pokeapi.co/api/v2/pokemon/{number}"
+            for number in range(1, 151)
+        ),
+        tempdir=tmpdir,
+    ) as pool:
+        pool.download()
+        assert len(os.listdir(tmpdir)) == 151
+
+    # the tempfiles should be removed at this point
+    assert len(os.listdir(tmpdir)) == 0
+
+    print(f"Finished in {time.perf_counter() - start}s")