Bump itsdangerous from 0.24 to 1.0.0 in /{{cookiecutter.app_name}}

Bumps [itsdangerous](https://github.com/pallets/itsdangerous) from 0.24 to 1.0.0.
- [Release notes](https://github.com/pallets/itsdangerous/releases)
- [Changelog](https://github.com/pallets/itsdangerous/blob/master/CHANGES.rst)
- [Commits](https://github.com/pallets/itsdangerous/compare/0.24...1.0.0)

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

{{cookiecutter.app_name}}/Pipfile

@@ -9,7 +9,7 @@ Flask = "==1.0.2"
 MarkupSafe = "==1.0"
 Werkzeug = "==0.14.1"
 Jinja2 = "==2.10"
-itsdangerous = "==0.24"
+itsdangerous = "==1.0.0"
 click = ">=5.0"
 
 # Database