add November 20th to brazilian holidays #68

Job	Run time
Documentation	1m 0s
Julia 1.6 - ubuntu-latest - x64 - push	51s
Julia 1.6 - windows-latest - x64 - push	8m 27s
Julia 1.6 - macOS-latest - x64 - push	1m 17s
Julia 1.7 - ubuntu-latest - x64 - push	50s
Julia 1.7 - windows-latest - x64 - push	1m 2s
Julia 1.7 - macOS-latest - x64 - push	1m 16s
Julia 1.8 - ubuntu-latest - x64 - push	46s
Julia 1.8 - windows-latest - x64 - push	1m 4s
Julia 1.8 - macOS-latest - x64 - push	58s
Julia 1 - ubuntu-latest - x64 - push	52s
Julia 1 - windows-latest - x64 - push	1m 27s
Julia 1 - macOS-latest - x64 - push	1m 41s
Julia nightly - ubuntu-latest - x64 - push	1m 2s
Julia nightly - windows-latest - x64 - push	1m 31s
Julia nightly - macOS-latest - x64 - push	2m 0s
	26m 4s

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