Merge pull request #30 from entn-at/fix-tfds

Limit tensorflow-datasets dependency to <4.0.0, as its SubwordTextEncoder was deprecated

Author: nglehuy

setup.py

@@ -19,7 +19,7 @@
 
 requirements = [
     "tensorflow>=2.3.0",
-    "tensorflow-datasets>=3.2.1",
+    "tensorflow-datasets>=3.2.1,<4.0.0",
     "tensorflow-addons>=0.10.0",
     "setuptools>=47.1.1",
     "librosa>=0.7.2",