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