Update sqlalchemy from 1.2.5 to 1.2.13

Author: pyup-bot

requirements.txt

@@ -4,6 +4,6 @@ Flask-Injector==0.10.1
 Flask-OpenTracing==0.2.0
 Flask-Script==2.0.6
 Flask-SQLAlchemy==2.3.2
-SQLAlchemy==1.2.5
+SQLAlchemy==1.2.13
 python-json-logger==0.1.8
 requests==2.18.4