Describe the bug
According to ISO8601, the time offsets are from UTC.
UTC offsets can range from -12:00 to +14:00

Based on the spec, the validator isISO8601 should return false for any timezone offset beyond that range. However, the validator is returning true for these values.

Examples

Additional context
Validator.js version: v13.7.0
Node.js version: v14.18.1
OS platform: macOS