support multi-model pages #876

Job	Run time
build	3m 2s
Julia 1.6 - ubuntu-latest - x64	3m 18s
Julia 1.6 - macOS-latest - x64	3m 17s
Julia 1.6 - windows-latest - x64	12m 38s
Julia 1 - ubuntu-latest - x64	4m 55s
Julia 1 - macOS-latest - x64	5m 11s
Julia 1 - windows-latest - x64	6m 23s
Julia pre - ubuntu-latest - x64	4m 43s
Julia pre - macOS-latest - x64	5m 16s
Julia pre - windows-latest - x64	5m 46s
Julia nightly - ubuntu-latest - x64	5m 23s
Julia nightly - macOS-latest - x64	5m 38s
Julia nightly - windows-latest - x64	6m 38s
	1h 12m 8s

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