vulnerabilities in outdated dependencies

[ubiquitin]

Issues to fix by upgrading dependencies:

Upgrade flask@0.10.1 to flask@0.12.3 to fix

• Improper Input Validation
• Denial of Service (DOS)

Upgrade pyyaml@3.11 to pyyaml@4.1 to fix

• Arbitrary Code Execution [High Severity] - bug in pyyaml@3.11

Upgrade requests@2.3.0 to requests@2.6.0 to fix

• Session Fixation [Medium Severity]
• HTTP Request Redirection [Medium Severity]
• Information Exposure [High Severity]

Pin Jinja2@2.7.3 to Jinja2@2.10.1 to fix

• Sandbox Escape [Medium Severity] introduced by flask@0.10.1 > Jinja2@2.7.3
• Sandbox Bypass [High Severity]