upgrade to vault 0.11.1

[cypherhat]

Description

The install script was changed to use vault 0.11.1. We also changed the script to use sudo to mv the vault executable into /usr/local/bin.

Motivation and Context

Stay current with vault and support linux.

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• [ ] Documentation enhancement
• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.