Allow itertools 0.14, bump Cargo.lock to it #2811

Job	Run time
docs	23s
check-cfg	22s
minimal	17s
msrv	51s
rustfmt-clippy	29s
quickchecking	20s
test-book	8s
test (ubuntu-latest, 9.0, 0, 0, 0, 0)	1m 42s
test (ubuntu-latest, 9.0, 0, 0, 1, 0)	1m 55s
test-no-headers	27s
test-expectations (ubuntu-latest)	25s
test (ubuntu-latest, 9.0, 0, 1, 0, 0)	1m 44s
test-expectations (macos-latest)	13s
test (ubuntu-latest, 9.0, 0, 1, 1, 0)	1m 44s
test (ubuntu-latest, 9.0, 1, 0, 0, 0)	2m 20s
test (ubuntu-latest, 9.0, 1, 0, 1, 0)	2m 12s
test (ubuntu-latest, 9.0, 1, 1, 0, 0)	2m 10s
test (ubuntu-latest, 9.0, 1, 1, 1, 0)	2m 10s
test (ubuntu-latest, 16.0, 0, 0, 0, 0)	9m 43s
test (ubuntu-latest, 16.0, 0, 0, 1, 0)	9m 8s
test (ubuntu-latest, 16.0, 0, 1, 0, 0)	19m 13s
test (ubuntu-latest, 16.0, 0, 1, 1, 0)	9m 16s
test (ubuntu-latest, 16.0, 1, 0, 0, 0)	5m 4s
test (ubuntu-latest, 16.0, 1, 0, 1, 0)	5m 1s
test (ubuntu-latest, 16.0, 1, 1, 0, 0)	20m 5s
test (ubuntu-latest, 16.0, 1, 1, 1, 0)	4m 55s
test (ubuntu-latest, 16.0, 0, 0, 1)	2m 30s
test (macos-latest, 16.0, 0, 0, 0)	2m 6s
success	1s
	1h 46m 54s

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