Bump flask-cors from 3.0.2 to 3.0.6

Bumps [flask-cors](/~https://github.com/corydolphin/flask-cors) from 3.0.2 to 3.0.6.
- [Release notes](/~https://github.com/corydolphin/flask-cors/releases)
- [Changelog](/~https://github.com/corydolphin/flask-cors/blob/master/CHANGELOG.md)
- [Commits](corydolphin/flask-cors@3.0.2...3.0.6)

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

setup.py

@@ -19,7 +19,7 @@
 
 api_requirements = [
     'flask == 1.0.2',
-    'flask-cors == 3.0.2',
+    'flask-cors ==3.0.6',
     'gunicorn >= 19.7.1',
     ]