Update dependency MarkupSafe to v1.1.0

Author: renovate-bot

requirements.txt

@@ -11,7 +11,7 @@ ipfsapi==0.4.2.post1
 itsdangerous==0.24
 Jinja2==2.9.6
 Mako==1.0.7
-MarkupSafe==1.0
+MarkupSafe==1.1.0
 python-dateutil==2.6.1
 python-editor==1.0.3
 requests==2.18.4