Update flask-pyoidc requirement from ~=2.2.0 to ~=3.7.0

Updates the requirements on [flask-pyoidc](https://github.com/zamzterz/flask-pyoidc) to permit the latest version.
- [Release notes](https://github.com/zamzterz/flask-pyoidc/releases)
- [Commits](zamzterz/Flask-pyoidc@v2.2.0...v3.7.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -4,7 +4,7 @@ Flask~=1.1.2
 Flask-Gzip~=0.2
 Flask-Mail~=0.9.1
 Flask-Migrate~=2.5.3
-Flask-pyoidc~=2.2.0
+Flask-pyoidc~=3.7.0
 flask_sqlalchemy~=2.4.4
 gunicorn~=20.0.4
 onesignal-sdk~=1.0.0