Allows TimeUuid and Uuid to be compared for equality

Currently, if you try to compare a Uuid and TimeUuid, there's some weirdness because of how Comparable implements ==.

[2] pry(main)> id = Cql::TimeUuid::Generator.new.next
=> #<Cql::TimeUuid:0x00000001d6fe88 @n=198073153519907614003849507369077940458>
[3] pry(main)> id2 = Cql::Uuid.new(id.value)
=> #<Cql::Uuid:0x00000001d9df40 @n=198073153519907614003849507369077940458>
[4] pry(main)> id2 == id
=> true
[5] pry(main)> id == id2
=> false

This patch reverses the order of operations allowing a Uuid and TimeUuid with the same value to be equal.