fix: flatten for Either (#41)

[second-ed]

No description provided.

[codspeed-hq]

Congrats! CodSpeed is installed 🎉

🆕 21 new benchmarks were detected.

You will start to see performance impacts in the reports once the benchmarks are run from your default branch.

Detected benchmarks

• test_ok_map_chain: 34.3 µs
• test_err_map_short_circuit: 39.7 µs
• test_stream_filter: 6.5 ms
• test_identity: 13.3 µs
• test_invert: 21.1 µs
• test_stream_partition: 772.6 µs
• test_new_type_creation: 30.8 µs
• test_stream_of_results: 338.3 µs
• test_new_type_map: 32.5 µs
• test_stream_of_results_sequence: 402.9 µs
• test_new_type_with_converter: 33.8 µs
• test_all_of: 27.8 µs
• test_any_of: 26.4 µs
• test_compose: 22.9 µs
• test_err_creation: 4.9 ms
• test_result_unwrap: 13.8 µs
• test_stream_fold: 644.1 µs
• test_stream_map: 8.1 ms
• test_stream_map_filter_chain: 21 ms
• test_ok_creation: 1.5 ms
• ...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

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