Bump squizlabs/php_codesniffer from 3.8.1 to 3.9.0 #1764

Job	Run time
build (STATIC_CODE_ANALYSIS, 8.1, FALSE, ^4)	27s
build (INTEGRATED_TEST_ON_OLDEST_SUPPORTED, 8.1, FALSE, ^4)	21s
build (INTEGRATED_TEST_ON_PREVIOUS_MINOR, 8.1, FALSE, ^4)	3m 11s
build (ISOLATED_TEST_ON_CURRENT, 8.1, FALSE, ^4)	2m 54s
build (INTEGRATED_TEST_ON_CURRENT, 8.1, FALSE, ^4)	3m 25s
build (ISOLATED_TEST_ON_CURRENT_DEV, 8.1, FALSE, ^4)	2m 26s
build (INTEGRATED_TEST_ON_CURRENT_DEV, 8.1, FALSE, ^4)	2m 48s
build (STRICT_DEPRECATED_CODE_SCAN, 8.1, FALSE, ^4)	17s
build (ISOLATED_TEST_ON_NEXT_MINOR, 8.1, FALSE, ^4)	20s
build (DEPRECATED_CODE_SCAN_W_CONTRIB, 8.1, FALSE, ^4)	1m 25s
build (INTEGRATED_TEST_ON_NEXT_MINOR_DEV, 8.1, FALSE, ^4)	17s
build (ISOLATED_TEST_ON_NEXT_MINOR_DEV, 8.1, FALSE, ^4)	29s
build (LOOSE_DEPRECATED_CODE_SCAN, 8.1, FALSE, ^4)	1m 51s
build (INTEGRATED_TEST_ON_LATEST_LTS, 8.2, FALSE)	31s
build (ISOLATED_TEST_ON_CURRENT, 8.1, TRUE)	2m 26s
build (ISOLATED_TEST_ON_CURRENT, 8.2)	1m 52s
all-successful	4s
	25m 4s

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