Write Unit Tests

[cdhunt]

• [ ] Make sure command arguments for op are correct
• [ ] Duplication handling in Get-SecretInfo and Get-Secret
• [ ] Get-Secret works for all known variations of Password and Login items
  • Returns totp
• [ ] Set-Secret
  • Types
  • byte[]
  • string
  • SecureString
  • PSCredential
  • Hashtable
  • Create vs Edit
  • Sanitizes Verbose messages