Fix build for SC2236 (#496)

* attempt to fix build

correcting error message from travis ci

In ./github-dev/cleanup-pr-branch line 5:
if [[ ! -z "$TOKEN" ]]; then
      ^-- SC2236: Use -n instead of ! -z.

* Update cleanup-pr-branch

* Update release-email-notification

corrected SC2236

* Update upload-assets

correct SC2236

* Update sendemail

Fix SC2236

* Update entrypoint.sh

Fix SC2236

* Update run

Fix SC2236

github-dev/cleanup-pr-branch

@@ -2,7 +2,7 @@
 set -e
 set -o pipefail
 
-if [[ ! -z "$TOKEN" ]]; then
+if [[ -n "$TOKEN" ]]; then
 	GITHUB_TOKEN=$TOKEN
 fi