Suggestion for new requirements.txt

[VisionsOfDrifting]

Hello, I'd like to thank you for keeping this repository up. This example has given me some ideas for my API.

I'd like to suggest the following requirement versions because the ones in the repo appear to be dated.

alembic==1.4.2
bcrypt==3.1.7
cffi==1.14.0
click==7.1.2
coverage==5.1
Flask==1.1.2
Flask-Bcrypt==0.7.1
Flask-Cors==3.0.8
Flask-Migrate==2.5.3
Flask-Script==2.0.6
Flask-SQLAlchemy==2.4.3
Flask-Testing==0.8.0
itsdangerous==1.1.0
Jinja2==2.11.2
Mako==1.1.3
MarkupSafe==1.1.1
psycopg2==2.8.5
pycparser==2.20
PyJWT==1.7.1
python-dateutil==2.8.1
python-editor==1.0.4
six==1.15.0
SQLAlchemy==1.3.17
Werkzeug==1.0.1

Here is a PR
#23

Thanks again for keeping this example up!