Bump flask from 1.1.1 to 1.1.2

Bumps [flask](https://github.com/pallets/flask) from 1.1.1 to 1.1.2.
- [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/1.1.1...1.1.2)

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

setup.py

@@ -32,7 +32,7 @@ setup(
     keywords='gliding ogn',
     packages=find_packages(exclude=['tests', 'tests.*']),
     install_requires=[
-        'Flask==1.1.1',
+        'Flask==1.1.2',
         'Flask-SQLAlchemy==2.4.1',
         'Flask-Migrate==2.5.3',
         'Flask-Bootstrap==3.3.7.1',