Bump flask from 1.0.2 to 1.0.3 in /{{cookiecutter.app_name}}

Bumps [flask](https://github.com/pallets/flask) from 1.0.2 to 1.0.3.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/master/CHANGES.rst)
- [Commits](https://github.com/pallets/flask/compare/1.0.2...1.0.3

)

Signed-off-by: dependabot[bot] <support@dependabot.com>

{{cookiecutter.app_name}}/Pipfile

@@ -5,7 +5,7 @@ name = "pypi"
 
 [packages]
 # Flask
-Flask = "==1.0.2"
+Flask = "==1.0.3"
 MarkupSafe = "==1.1.1"
 Werkzeug = "==0.15.2"
 Jinja2 = "==2.10.1"