release: update version number in preparation for release (google#5942)

Merge pull request google#5925 from alschmiedt/Q4_2021_patch_4

release: Patch google#3 for Q4 2021 release

release: update files for Q4 2021 patch release (google#5859)

Merge pull request google#5828 from alschmiedt/add_package_lock

chore: update the package-lock

Merge pull request google#5808 from google/rc_2021_12

release: Rc 2021 12

chore: rebuild for release (google#5573)

Merge pull request google#4976 from google/rc_2021_7

Rc 2021 7

Merge pull request google#4778 from alschmiedt/march_patch

Patch release with google#4775

Merge pull request google#4735 from google/rc_2021_3

Rc 2021 3

Merge pull request google#4548 from google/rc_2020_12

Rc 2020 12