Add bashbrew to Travis

.travis.yml

@@ -11,6 +11,8 @@ branches:
 
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images
+  - wget https://doi-janky.infosiftr.net/job/bashbrew/lastSuccessfulBuild/artifact/bin/bashbrew-amd64
+  - export PATH=$PATH:$PWD
 
 before_script:
   - env | sort
@@ -43,8 +45,7 @@ jobs:
     - <<: *test-scripts
       env: SCRIPT=generate-stackbrew-library.sh
       script:
-        # Only syntax check due bashbrew dependency
-        - bash -n generate-stackbrew-library.sh
+        - ./generate-stackbrew-library.sh
 
     - stage: test images
       env: VERSION=11.0 VARIANT=fpm-alpine ARCH=amd64