chore: release 4.2.8

[release-please[bot]]

:robot: I have created a release *beep* *boop*

4.2.8 (2021-07-21)

Bug Fixes

• Updating WORKSPACE files to use the newest version of the Typescript generator. (#600) (9f31d3f)

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[release-please[bot]]

:robot: Release is at https://github.com/googleapis/nodejs-language/releases/tag/v4.2.8 :sunflower:

[release-tool-publish-reporter[bot]]

The release build has started, the log can be viewed here. :sunflower:

[release-tool-publish-reporter[bot]]

:egg: You hatched a release! The release build finished successfully! :purple_heart: