Bump codecov/codecov-action from 3 to 4 #247

Job	Run time
test (1.0, x64, ubuntu-latest)	2m 28s
test (1.0, x64, macOS-latest)	5m 9s
test (1.0, x64, windows-latest)	6m 48s
test (1.0, x86, ubuntu-latest)	2m 21s
test (1.0, x86, windows-latest)	4m 15s
test (1.6, x64, ubuntu-latest)	2m 38s
test (1.6, x64, macOS-latest)	3m 39s
test (1.6, x64, windows-latest)	8m 38s
test (1.6, x86, ubuntu-latest)	2m 39s
test (1.6, x86, windows-latest)	11m 14s
test (1, x64, ubuntu-latest)	2m 41s
test (1, x64, macOS-latest)	4m 32s
test (1, x64, windows-latest)	3m 32s
test (1, x86, ubuntu-latest)	2m 29s
test (1, x86, windows-latest)	3m 32s
test (nightly, x64, ubuntu-latest)	3m 32s
test (nightly, x64, macOS-latest)	4m 17s
test (nightly, x64, windows-latest)	5m 0s
test (nightly, x86, ubuntu-latest)	3m 28s
test (nightly, x86, windows-latest)	4m 49s
	1h 27m 41s

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