v1.7.0

• Notify user when their token will soon expire (#81)
  To help avoid unexpected expiration of tokens, the user is provided with a warning when they use a renewable token and it is due to expire in less than 7 days (default).
  The threshold for notifying about renewing tokens, SSH_MS_RENEW_THRESHOLD can be defined for make build and make binaries.
• Use only vault/api in application code (#80)
  To reduce size as well as simply issues arising from indirect dependencies, replacing the use of HashiCorp vault/command with the api in the helper code.
• Add support for SendEnv (#76)
  In cases where the remote server supports environment variables being passed across, adding support for storing SendEnv in the connection's configuration
• Updated dependencies (#75)
  • vault to v1.8.5
  • vault/sdk to v0.2.2-0.20211101151547-6654f4b913f9
  • mimetype to v1.4.0
  • logrus to v1.8.1
• Fix incorrect conversion between integer types (#74)
  Updated NGINX and PMM ports to become uint16 and switched to strconv.ParseUint
• Updated README
  Added the CodeQL badge and updated the recommended version of Vault
• Adding CodeQL workflow
• Upgraded Vault to 1.8.4 (#73)