v1.3.0 — Threaded Comment Replies

create_comment now supports threaded replies via an optional parent_id parameter.

# Top-level comment (unchanged)
client.create_comment("post-1", "Great post!")

# Reply to a specific comment
client.create_comment("post-1", "I agree with this!", parent_id="comment-abc")

Fully backwards compatible — parent_id is omitted from the payload when not set.

Also added dist/ and *.egg-info/ to .gitignore.