Fix tox errors

[sourcery-ai[bot]]

Sourcery Code Quality Report

✅  Merging this PR will increase code quality in the affected files by 0.03%.

Quality metrics	Before	After	Change
Complexity	0.79 ⭐	0.80 ⭐	0.01 👎
Method Length	96.93 🙂	98.32 🙂	1.39 👎
Working memory	7.65 🙂	7.66 🙂	0.01 👎
Quality	67.12% 🙂	67.15% 🙂	0.03% 👍

Other metrics	Before	After	Change
Lines	515	521	6

Changed files	Quality Before	Quality After	Quality Change
btclib/hashes.py	87.07% ⭐	86.19% ⭐	-0.88% 👎
btclib/bip32/der_path.py	80.16% ⭐	80.11% ⭐	-0.05% 👎
tests/tx/test_tx.py	60.26% 🙂	60.26% 🙂	0.00%

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
tests/tx/test_tx.py	test_tx	0 ⭐	697 ⛔	12 😞	46.17% 😞	Try splitting into smaller methods. Extract out complex expressions
tests/tx/test_tx.py	test_dataclasses_json_dict	0 ⭐	266 ⛔	9 🙂	56.58% 🙂	Try splitting into smaller methods
tests/tx/test_tx.py	test_coinbase_block_1	0 ⭐	229 ⛔	8 🙂	60.71% 🙂	Try splitting into smaller methods
tests/tx/test_tx.py	test_double_witness	0 ⭐	186 😞	5 ⭐	71.16% 🙂	Try splitting into smaller methods
tests/tx/test_tx.py	test_wiki_transaction	0 ⭐	171 😞	5 ⭐	72.48% 🙂	Try splitting into smaller methods

Legend and Explanation

The emojis denote the absolute quality of the code:

• ⭐ excellent
• 🙂 good
• 😞 poor
• ⛔ very poor

The 👍 and 👎 indicate whether the quality has improved or gotten worse with this pull request.

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[fametrano]

superseeded by https://github.com/btclib-org/btclib/pull/78