add .7 to compatibility matrix. (#979)

README.md

@@ -37,6 +37,7 @@ The following is the corresponding ``torchaudio`` versions and supported Python
 | ``torch``                | ``torchaudio``           | ``python``                      |
 | ------------------------ | ------------------------ | ------------------------------- |
 | ``master`` / ``nightly`` | ``master`` / ``nightly`` | ``>=3.6``                       |
+| ``1.7.0``                | ``0.7.0``                | ``>=3.6``                       |
 | ``1.6.0``                | ``0.6.0``                | ``>=3.6``                       |
 | ``1.5.0``                | ``0.5.0``                | ``>=3.5``                       |
 | ``1.4.0``                | ``0.4.0``                | ``==2.7``, ``>=3.5``, ``<=3.8`` |