Update requirements.txt

requirements.txt

@@ -32,6 +32,7 @@ flask-was==0.1.0
 Flask-Redisboard==0.2.0
 Flask-Multipass==0.3.3
 JetKit-Flask==9.0.1
+flask-hintful==0.0.7
 SQLAlchemy==1.3.23
 psycopg2==2.8.6
 wget==3.2