setup: bump oauthclient major version #1259

Job	Run time
Tests (circulation, 3.9, pypi, postgresql14, opensearch2)	8m 8s
Tests (ils, 3.9, pypi, postgresql14, opensearch2)	14m 41s
Tests (ill, 3.9, pypi, postgresql14, opensearch2)	4m 8s
Tests (document_requests, 3.9, pypi, postgresql14, opensearch2)	3m 9s
Tests (acquisition, 3.9, pypi, postgresql14, opensearch2)	2m 31s
	32m 37s

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