Update dependency Flask-RESTful to v0.3.9

Author: renovate-bot

requirements.txt

@@ -4,7 +4,7 @@ pyfiglet==0.7
 termcolor==1.1.0
 colorama==0.4.3
 Flask==1.1.4
-Flask-RESTful==0.3.8
+Flask-RESTful==0.3.9
 flask-restplus==0.13.0
 Flask-Cors==3.0.9
 uWSGI==2.0.18