Publish Canary version to trusted testers

Until now, the extension was published publicly, and not privately. This
CL fixes this.

Fixed: twpowertools:104
Change-Id: I87857fa8097c01f721d95ef2d7a7a1111df165bb
diff --git a/roles/cws-publish/tasks/main.yaml b/roles/cws-publish/tasks/main.yaml
index a22f531..a6ef36f 100644
--- a/roles/cws-publish/tasks/main.yaml
+++ b/roles/cws-publish/tasks/main.yaml
@@ -33,7 +33,7 @@
     cmd: |
       set -o pipefail
       chrome-webstore-upload upload --auto-publish --extension-id {{ extension_id }} \
-          --source {{ zip_file.stdout|quote }} \
+          --trusted-testers --source {{ zip_file.stdout|quote }} \
           --client-id {{ credentials.clientId|quote }} \
           --refresh-token {{ credentials.refreshToken|quote }} \
           2>&1 | tee cws-log.txt