fix protobuf version

yt605155624 · yt605155624 · commit 29a25b8c9f09 · 2022-07-13T05:08:43.000Z
diff --git a/setup.py b/setup.py
@@ -50,6 +50,7 @@
     "paddlespeech_feat",
     "Pillow>=9.0.0"
     "praatio==5.0.0",
+    "protobuf>=3.1.0, <=3.20.0",
     "pypinyin",
     "pypinyin-dict",
     "python-dateutil",
