chore(v1): release 1.37.14 (GoogleCloudPlatform#2571)

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chore(main): release 2.21.2 (GoogleCloudPlatform#2568)

* chore(main): release 2.21.2

* fix: update version

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Co-authored-by: Jin Hou <jinphou@google.com>

chore(main): release 2.21.1 (GoogleCloudPlatform#2546)

* chore(main): release 2.21.1

* Updates license check file with new version number.

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Co-authored-by: Jonathan Hess <hessjc@google.com>

chore(v1): release 1.37.13 (GoogleCloudPlatform#2559)

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chore(v1): release 1.37.12 (GoogleCloudPlatform#2538)

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chore(main): release 2.21.0 (GoogleCloudPlatform#2532)

* chore(main): release 2.21.0

* chore: Update documentation to latest version.

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Co-authored-by: kgala2 <galakp@google.com>

chore(main): release 2.20.0 (GoogleCloudPlatform#2516)

* chore(main): release 2.20.0

* docs: Update documentation to latest version.

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Co-authored-by: Jonathan Hess <hessjc@google.com>

chore(v1): release 1.37.11 (GoogleCloudPlatform#2524)

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chore(main): release 2.19.0 (GoogleCloudPlatform#2507)

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chore(v1): release 1.37.10 (GoogleCloudPlatform#2502)

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