Bump stripe from 2.54.0 to 2.56.0 in /auctioning_platform (#155)

Bumps [stripe](https://github.com/stripe/stripe-python) from 2.54.0 to 2.56.0.
- [Release notes](https://github.com/stripe/stripe-python/releases)
- [Changelog](https://github.com/stripe/stripe-python/blob/master/CHANGELOG.md)
- [Commits](stripe/stripe-python@v2.54.0...v2.56.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

auctioning_platform/payments/requirements.txt

@@ -1,4 +1,4 @@
 injector
 SQLAlchemy==1.3.19
-stripe==2.54.0
+stripe==2.56.0
 requests==2.22.0

auctioning_platform/requirements.txt

@@ -55,7 +55,7 @@ six==1.15.0               # via bcrypt, packaging, python-dateutil, sqlalchemy-u
 speaklater==1.3           # via flask-babelex
 sqlalchemy-utils==0.36.8  # via pytest-sqlalchemy
 sqlalchemy==1.3.19        # via -r ./auctions_infrastructure/requirements.txt, -r ./customer_relationship/requirements.txt, -r ./db_infrastructure/requirements.txt, -r ./main/requirements.txt, -r ./payments/requirements.txt, -r ./processes/requirements.txt, -r ./shipping_infrastructure/requirements.txt, -r ./web_app/requirements.txt, -r ./web_app_models/requirements.txt, pytest-sqlalchemy, sqlalchemy-utils
-stripe==2.54.0            # via -r ./payments/requirements.txt
+stripe==2.56.0            # via -r ./payments/requirements.txt
 text-unidecode==1.3       # via faker
 toml==0.10.2              # via pytest
 typing-extensions==3.7.4.3  # via -r ./foundation/requirements.txt, -r ./processes/requirements.txt, typing-inspect