Merge pull request #38 from USTC-iCourse/dependabot/pip/flask-securit…

…y-too-5.3.3

Bump flask-security-too from 5.3.1 to 5.3.3

requirements.txt

@@ -2,7 +2,7 @@ Flask==2.3.2
 Flask-WTF==1.2.1
 Flask-SQLAlchemy==3.1.1
 Flask-login==0.6.2
-flask-security-too==5.3.1
+flask-security-too==5.3.3
 itsdangerous==2.1.2
 flask-mail==0.9.1
 jinja2==3.1.2
@@ -19,7 +19,7 @@ markdown==3.4.1
 pytz==2021.1
 werkzeug==2.3.8
 cachelib==0.10.2
-email_validator==1.1.3
+email_validator==2.0.0
 gunicorn==20.1.0
 pdfkit==1.0.0
 # don't know why these dependencies fail...