Merge pull request #183 from python-microservices/pyup-update-sqlalchemy-1.3.18-to-1.3.19

Update sqlalchemy to 1.3.19

Author: alexppg

requirements.txt

@@ -1,5 +1,5 @@
 Flask-SQLAlchemy==2.4.3
-SQLAlchemy==1.3.18
+SQLAlchemy==1.3.19
 Flask-Script==2.0.6
 py-ms[all]==2.6.0
 marshmallow==3.6.1