message: build: ensure action: merge label is included on release PRs
  The release PRs should include the `action: merge`, `PullApprove: disable` and `comp: build & ci`
  labels.
  PR Close
diff: @@ -32,4 +32,7 @@ export const release: ReleaseConfig = {
  generateReleaseNotesForHead: async () => {
  exec('yarn -s gulp changelog', {cwd: join(__dirname, '../')});
  },
  + // The `comp: *` labels will be automatically added by PullApprove and the targeting label will
  + // be added by the release tooling, only `action: merge` must be manually included to the list.
  + releasePrLabels: ['comp: build & ci', 'action: merge', 'PullApprove: disable'],
  };
  