chore(deps): update dependency pytest-cov to v7 #399

Job	Run time
Lint check / Lint check (3.11)	9s
Lint check / Lint check (3.13)	9s
Type check / Type check (3.10)	18s
Type check / Type check (3.11)	14s
Type check / Type check (3.13)	15s
Lint check / Lint check (3.10)	13s
Lint check / Lint check (3.12)	9s
Unit tests / Unit tests (ubuntu-latest, 3.11)	24s
Type check / Type check (3.12)	18s
Unit tests / Unit tests (ubuntu-latest, 3.10)	23s
Unit tests / Unit tests (ubuntu-latest, 3.12)	24s
Unit tests / Unit tests (windows-latest, 3.11)	43s
Unit tests / Unit tests (ubuntu-latest, 3.13)	23s
Unit tests / Unit tests (windows-latest, 3.10)	36s
Unit tests / Unit tests (windows-latest, 3.13)	45s
Docs check / Docs check	1m 9s
Async dostrings check / Async docstrings check	20s
Unit tests / Unit tests (windows-latest, 3.12)	45s
Integration tests / Integration tests (3.13)	29s
Integration tests / Integration tests (3.11)	31s
Integration tests / Integration tests (3.12)	37s
Integration tests / Integration tests (3.10)	31s
Integration tests / Approve integration tests for PRs from forks	0s
Integration tests / Integration tests for PRs from forks	0s
	9m 45s

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