Update cryptography version

ojarva · ojarva · commit 0be14447de93 · 2019-05-16T17:27:54.000+03:00
diff --git a/requirements.txt b/requirements.txt
@@ -1,3 +1,3 @@
-cryptography==2.1.4
+cryptography==2.6.1
 ecdsa==0.13
 yapf==0.21.0
