Add version compatibility matrix (#685)

* Add version compatibility matrix

README.md

@@ -28,10 +28,19 @@ to use and feel like a natural extension.
 
 Dependencies
 ------------
-* pytorch (nightly version needed for development)
+* PyTorch (See below for the compatible versions)
 * libsox v14.3.2 or above (only required when building from source)
 * [optional] vesis84/kaldi-io-for-python commit cb46cb1f44318a5d04d4941cf39084c5b021241e or above
 
+The following is the corresponding ``torchaudio`` versions and supported Python versions.
+
+| ``torch``                | ``torchaudio``           | ``python``                      |
+| ------------------------ | ------------------------ | ------------------------------- |
+| ``master`` / ``nightly`` | ``master`` / ``nightly`` | ``>=3.6``                       |
+| ``1.5.0``                | ``0.5.0``                | ``>=3.5``                       |
+| ``1.4.0``                | ``0.4.0``                | ``==2.7``, ``>=3.5``, ``<=3.8`` |
+
+
 Installation
 ------------