do only on specific dev branch

.travis.yml

@@ -39,10 +39,10 @@ deploy:
       api_key:
           secure: "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"
       on:
-          branch: master
+          branch: issue-71
 before_deploy:
     - >
-      if [[ $TRAVIS_BRANCH == "master" ]]; then
+      if [[ $TRAVIS_BRANCH == "issue-71" ]]; then
         gh release delete nightly -R ${GITHUB_REPOSITORY} -y
         git tag -f nightly || true &&
         git remote add gh https://${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git &&