Fix codecov upload #516

Job	Run time
Documentation	1m 35s
Julia 1.0 - ubuntu-latest - x64	4m 7s
Julia 1.0 - macos-latest - x64	4m 13s
Julia 1.0 - windows-latest - x64	7m 48s
Julia 1.6 - ubuntu-latest - x64	3m 24s
Julia 1.6 - macos-latest - x64	3m 22s
Julia 1.6 - windows-latest - x64	11m 55s
Julia 1 - ubuntu-latest - x64	2m 57s
Julia 1 - macos-latest - x64	3m 32s
Julia 1 - windows-latest - x64	4m 12s
Julia nightly - ubuntu-latest - x64	4m 39s
Julia nightly - macos-latest - x64	4m 56s
Julia nightly - windows-latest - x64	5m 26s
	1h 2m 6s

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