Fix Sanic version update.

Author: federicotdn

requirements.txt

@@ -38,7 +38,7 @@ pytz==2019.1
 rasa-sdk~=1.5.0
 colorclass==2.2.0
 terminaltables==3.1.0
-sanic==19.9.3
+sanic==19.9.0
 sanic-cors==0.9.9.post1
 sanic-jwt==1.3.2
 aiohttp==3.5.4