Update cryptography from 2.7 to 2.8 (#11)

pyup-bot · onlinejudge95 · commit e89fe9e23e8f · 2019-10-18T00:40:49.000+05:30
diff --git a/requirements/prod.txt b/requirements/prod.txt
@@ -12,7 +12,7 @@ Flask-Migrate==2.5.2
 PyMySQL==0.9.3
 
 # For encryption
-cryptography==2.7
+cryptography==2.8
 
 # For cli
 Flask-Script==2.0.6
