chore(async-jsonl): release v0.4.0

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🤖 New release

• async-jsonl: 0.3.1 -> 0.4.0 (⚠ API breaking changes)

⚠ async-jsonl breaking changes

--- failure trait_method_added: pub trait method added ---

Description:
A non-sealed public trait added a new method without a default implementation, which breaks downstream implementations of the trait
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#trait-new-item-no-default
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.41.0/src/lints/trait_method_added.ron

Failed in:
  trait method async_jsonl::JsonlReader::count in file /tmp/.tmpHWJEx5/async-jsonl/crates/async_jsonl/src/async_jsonl.rs:164

Changelog

0.4.0 - 2025-06-04

Added

• add count function to JsonlReader (#11)

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