setup: bump oauthclient major version #1276

Job	Run time
Tests (acquisition, 3.9, pypi, postgresql14, opensearch2)	2m 0s
Tests (ils, 3.9, pypi, postgresql14, opensearch2)	14m 40s
Tests (ill, 3.9, pypi, postgresql14, opensearch2)	3m 21s
Tests (document_requests, 3.9, pypi, postgresql14, opensearch2)	3m 6s
Tests (circulation, 3.9, pypi, postgresql14, opensearch2)	8m 14s
	31m 21s

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