Fix downgrade CI #669

Job	Run time
downgrade (1.10, core)	19s
downgrade (1.10, downstream)	21s
downgrade (1.10, wrappers)	18s
downgrade (1.10, misc)	18s
test (core, 1.10, ubuntu-latest)	15m 32s
test (core, 1.10, macos-latest)	33m 45s
test (core, 1, ubuntu-latest)	26m 44s
test (core, 1, macos-latest)	35m 41s
test (core, pre, ubuntu-latest)	14m 21s
test (downstream, 1.10, macos-latest)	6m 20s
test (downstream, 1.10, ubuntu-latest)	9m 31s
test (core, pre, macos-latest)	10m 13s
test (downstream, 1, ubuntu-latest)	22m 48s
test (downstream, pre, macos-latest)	8m 48s
test (downstream, 1, macos-latest)	14m 4s
test (wrappers, 1, ubuntu-latest)	17m 45s
test (wrappers, 1.10, ubuntu-latest)	7m 38s
test (downstream, pre, ubuntu-latest)	13m 47s
test (wrappers, 1, macos-latest)	10m 54s
test (wrappers, 1.10, macos-latest)	4m 52s
test (wrappers, pre, ubuntu-latest)	13m 50s
test (wrappers, pre, macos-latest)	8m 45s
test (misc, 1.10, ubuntu-latest)	6m 38s
test (misc, 1.10, macos-latest)	4m 26s
test (misc, pre, ubuntu-latest)	13m 55s
test (misc, 1, ubuntu-latest)	18m 18s
test (misc, 1, macos-latest)	9m 53s
test (misc, pre, macos-latest)	9m 4s
	5h 38m 48s

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