Bump flask from 1.0.3 to 1.1.0 in /{{cookiecutter.app_name}}

Bumps [flask](https://github.com/pallets/flask) from 1.0.3 to 1.1.0.
- [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/1.0.3...1.1.0)

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

{{cookiecutter.app_name}}/Pipfile

@@ -5,7 +5,7 @@ name = "pypi"
 
 [packages]
 # Flask
-Flask = "==1.0.3"
+Flask = "==1.1.0"
 Werkzeug = "==0.15.4"
 click = ">=5.0"