Update cryptography from 2.8 to 42.0.4

requirements.txt

@@ -1,6 +1,6 @@
 bcrypt==3.1.7
 coverage==5.0.3
-cryptography==2.8
+cryptography==42.0.4
 motor==2.1.0
 pymongo==3.10.1
 pytest==5.3.5