chore(ci): fix publishing @next on travis

.travis.yml

@@ -38,6 +38,11 @@ jobs:
   include:
   - node_js: '12'
 
-after_success:
+before_deploy:
   - node utils/apply_next_version.js
-  - ./utils/publish_all_packages.sh --tip-of-tree
+
+deploy:
+  provider: script
+  script: utils/publish_all_packages.sh --tip-of-tree
+  on:
+    branch: master

utils/publish_all_packages.sh

@@ -20,11 +20,6 @@ if [[ $# < 1 ]]; then
   exit 1
 fi
 
-if [[ $(git rev-parse --abbrev-ref HEAD) != "master" ]]; then
-  echo "ERROR: Cannot publish from branch '$(git rev-parse --abbrev-ref HEAD)' - it has to be 'master'"
-  exit 1
-fi
-
 if ! command -v npm >/dev/null; then
   echo "ERROR: NPM is not found"
   exit 1