chore: regenerate synth.metadata

[yoshi-automation]

This PR was generated using Autosynth. :rainbow:

Commits in this repo since last synth:

Log from Synthtool

``` synthtool > Executing /tmpfs/src/git/autosynth/working_repo/synth.py. .eslintignore .eslintrc.yml .github/ISSUE_TEMPLATE/bug_report.md .github/ISSUE_TEMPLATE/feature_request.md .github/ISSUE_TEMPLATE/support_request.md .github/PULL_REQUEST_TEMPLATE.md .github/release-please.yml .jsdoc.js .kokoro/common.cfg .kokoro/continuous/node10/common.cfg .kokoro/continuous/node10/docs.cfg .kokoro/continuous/node10/lint.cfg .kokoro/continuous/node10/samples-test.cfg .kokoro/continuous/node10/system-test.cfg .kokoro/continuous/node10/test.cfg .kokoro/continuous/node12/common.cfg .kokoro/continuous/node12/test.cfg .kokoro/continuous/node8/common.cfg .kokoro/continuous/node8/test.cfg .kokoro/docs.sh .kokoro/lint.sh .kokoro/presubmit/node10/common.cfg .kokoro/presubmit/node10/docs.cfg .kokoro/presubmit/node10/lint.cfg .kokoro/presubmit/node10/samples-test.cfg .kokoro/presubmit/node10/system-test.cfg .kokoro/presubmit/node10/test.cfg .kokoro/presubmit/node12/common.cfg .kokoro/presubmit/node12/test.cfg .kokoro/presubmit/node8/common.cfg .kokoro/presubmit/node8/test.cfg .kokoro/presubmit/windows/common.cfg .kokoro/presubmit/windows/test.cfg .kokoro/publish.sh .kokoro/release/docs.cfg .kokoro/release/docs.sh .kokoro/release/publish.cfg .kokoro/samples-test.sh .kokoro/system-test.sh .kokoro/test.bat .kokoro/test.sh .kokoro/trampoline.sh .nycrc .prettierignore .prettierrc CODE_OF_CONDUCT.md CONTRIBUTING.md LICENSE README.md codecov.yaml renovate.json samples/README.md synthtool > Wrote metadata to synth.metadata. ```

[codecov[bot]]

Codecov Report

Merging #153 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #153   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines          66     66           
  Branches       14     14           
=====================================
  Hits           66     66

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