feat: set is_human_readable to false

[absporl]

This allows implementations of Serialize to change behavior depending on the encoding method used (e.g. encode as base64 for human readable encodings such as JSON, and encode as binary strings for bencode).

[josecelano]

ACK 77aca3873bf5dda7d5f072acbd210c5c8a77e2bc

[josecelano]

Relates to: https://docs.rs/serde/latest/serde/trait.Serializer.html#method.is_human_readable