Requirements update

Updates nest_asyncio to most modern version.

Author: d-w-liu

setup.py

@@ -27,7 +27,7 @@
           "retry~=0.9",
           "aiohttp~=3.6",
           "minio~=5.0",
-          "nest_asyncio>=1.2,<1.3"
+          "nest_asyncio>=1.3"
       ],
       extras_require={
           'test': [