fix: merge test coverage before upload #3195

Job	Run time
tox env type on ubuntu-latest	14s
tox env dev on ubuntu-latest	9s
tox env docs on ubuntu-latest	12s
tox env pkg_meta on ubuntu-latest	16s
Test 3.13 Ubuntu	55s
tox env readme on ubuntu-latest	11s
Test 3.13 Windows	1m 33s
Test 3.13 macOS	58s
Test 3.12 Ubuntu	49s
Test 3.12 Windows	1m 28s
Test 3.12 macOS	45s
Test 3.11 Ubuntu	56s
Test 3.11 Windows	1m 19s
Test 3.11 macOS	51s
Test 3.10 Ubuntu	55s
Test 3.10 Windows	1m 17s
Test 3.10 macOS	53s
Test 3.9 Ubuntu	55s
Test 3.9 Windows	1m 25s
Test 3.9 macOS	57s
Test 3.8 Ubuntu	57s
Test 3.8 Windows	1m 13s
Test 3.8 macOS	1m 26s
Test 3.12 Ubuntu black=24.1.0	54s
Test 3.12 Ubuntu black=23.12.1	48s
Test 3.12 Ubuntu black=22.1.0	48s
Test 3.9 Ubuntu black=19.10b0 pydantic=1.8.2	1m 0s
Test 3.8 Ubuntu pydantic=1.8.2	56s
Test 3.8 Ubuntu isort=4.3.21 pydantic=1.5.1	51s
Combine Coverage Reports and Check	3s
	25m 54s

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