build(python/sdk): bump sdk version 0.20.1 -> 0.20.2 (#47)

Author: he-james

setup.py

@@ -7,7 +7,7 @@
 
 setup(
     name="assemblyai",
-    version="0.20.1",
+    version="0.20.2",
     description="AssemblyAI Python SDK",
     author="AssemblyAI",
     author_email="engineering.sdk@assemblyai.com",