chore(main): release 2.16.0 (googleapis#896)

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chore(main): release 2.15.2 (googleapis#891)

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chore(main): release 2.15.1 (googleapis#885)

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chore(main): release 2.15.0 (googleapis#867)

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chore(main): release 2.14.1 (googleapis#853)

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chore(main): release 2.14.0 (googleapis#845)

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chore(main): release 2.13.12 (googleapis#833)

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chore(main): release 2.13.11 (googleapis#820)

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chore(main): release 2.13.10 (googleapis#799)

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chore(main): release 2.13.9 (googleapis#804)

* fix(deps): allow protobuf 3.19.5 (googleapis#801)

* fix(deps): allow protobuf 3.19.5

* explicitly exclude protobuf 4.21.0

* update changelog/version

* update release date