Describe the bug
Currently, the isIPRange() method only supports IPv4 addresses. It should be extended to support IPv6 addresses as well.

Examples

isIPRange("192.0.2.0/24") // IPv4 CIDR is `true`
isIPRange("2001:db8::/32") // IPv6 CIDR is `false`

Additional context

• feature: Support CIDR notation in IsIP validator typestack/class-validator#727