Add libtiff 4.6.0 #59

Job	Run time
lint and style checks	26s
test (windows-latest, 3.8, false, false)	10m 39s
test (windows-latest, 3.9, false, false)	8m 49s
test (windows-latest, 3.10, false, false)	11m 23s
test (ubuntu-latest, 3.8, false, false)	3m 43s
test (ubuntu-latest, 3.9, false, false)	2m 54s
test (ubuntu-latest, 3.10, false, false)	3m 29s
test (macos-latest, 3.8, false, false)	4m 52s
test (macos-latest, 3.9, false, false)	5m 35s
test (macos-latest, 3.10, false, false)	5m 13s
test (3.11, ubuntu-latest, true, false)	3m 19s
test (3.10, ubuntu-latest, false, true)	3m 1s
coveralls	12s
	1h 3m 35s

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