Bump sqlalchemy from 1.3.3 to 1.3.4 in /{{cookiecutter.app_name}}

Bumps [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy) from 1.3.3 to 1.3.4.
- [Release notes](https://github.com/sqlalchemy/sqlalchemy/releases)
- [Changelog](https://github.com/sqlalchemy/sqlalchemy/blob/master/CHANGES)
- [Commits](https://github.com/sqlalchemy/sqlalchemy/commits)

{{cookiecutter.app_name}}/Pipfile

@@ -15,7 +15,7 @@ click = ">=5.0"
 # Database
 Flask-SQLAlchemy = "==2.4.0"
 psycopg2 = "==2.8.2"
-SQLAlchemy = "==1.3.3"
+SQLAlchemy = "==1.3.4"
 
 # Migrations
 Flask-Migrate = "==2.5.2"