v1.31.5

Chore

• Add gosec #nosec annotations and set explicit Content-Type on error responses
• Update Go dependencies
• Update node dependencies

Fix

• Escape _ and % in search terms so they match literally (#742)
• Match & and \ in address searches (#743)
• Validate AUTH parameter in MAIL FROM command (#744)
• MAIL FROM parameters must be space-separated per RFC 5321

Test

• Include additional tests for MAIL FROM parameters