message: Add counter Cassandra type
diff: #### primitive types (`T`)
  | Cassandra | Rust | Feature
  -|-----------|--------------|
  +|-----------|-------|-------|
  | tinyint | i8 | v4, v5 |
  | smallint | i16 | v4, v5 |
  | int | i32 | all |
  | float | f32 | all |
  | double | f64 | all |
  | uuid | [Uuid](https://doc.rust-lang.org/uuid/uuid/struct.Uuid.html) | all |
  +| counter | u64 | all |
  #### complex types
  | Cassandra | Rust + CDRS |
  