chore(main): release 1.12.0 (googleapis#1075)

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chore(main): release 1.11.0 (googleapis#1054)

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Chalmer Lowe <chalmerlowe@google.com>

chore(main): release 1.10.0 (googleapis#936)

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update changelog

create development release 1.11.0.dev2

create development release 1.11.0.dev1 branch

create development release 1.11.0.dev0 branch

created prerelease for v1.10.0rc1

chore(main): release 1.9.0 (googleapis#903)

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update changelog and version number