Tests

Merge pull request #528 from SciML/ChrisRackauckas-patch-1 #321

Job	Run time
Tests (pre, Core) / Tests - Core	5m 57s
Tests (1, nopre) / Tests - nopre	4m 59s
Tests (pre, Downstream) / Tests - Downstream	15m 21s
Tests (lts, nopre) / Tests - nopre	5m 8s
Tests (lts, Core) / Tests - Core	7m 35s
Tests (lts, Downstream) / Tests - Downstream	6m 12s
Tests (1, Downstream) / Tests - Downstream	7m 35s
Tests (1, Core) / Tests - Core	7m 36s
	1h 0m 23s

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