Fix test scripts to catch every non-zero exit code (#733)

Co-authored-by: Alexander <alex@Alexanders-MacBook-2021.local>
Co-authored-by: Gregor Martynus <39992+gr2m@users.noreply.github.com>

script/setup.sh

@@ -0,0 +1,3 @@
+set -Ee # Exit immediately if a command returns a non-zero status
+set -u  # Exit when references variables are undefined
+set -o pipefail  # Exit when any program execution in a pipeline breaks

script/test-all-templates.sh

@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
-set -e
+. ./script/setup.sh
 
-for template in $(./bin/create-probot-app.js --show-templates ALL); do
+TEMPLATES=$(./bin/create-probot-app.js --show-templates ALL)
+
+for template in $TEMPLATES; do
     npm run test:template $template;
 done

script/test-template.sh

@@ -1,7 +1,5 @@
 #!/usr/bin/env bash
-set -Ee # Exit immediately if a command returns a non-zero status
-set -u  # Exit when references variables are undefined
-set -o pipefail  # Exit when any program execution in a pipeline breaks
+. ./script/setup.sh
 
 readonly APP="./bin/create-probot-app.js"
 readonly TEMPLATE=$1