fix: build artifacts missing in release

Author: gruhn

.travis.yml

@@ -12,12 +12,13 @@ cache: npm
 
 deploy:
   - provider: script
+    cleanup: false
     on:
       all_branches: true
       condition: $TRAVIS_BRANCH =~ ^(master|alpha)$
-    script:
-      - npx semantic-release
+    script: npx semantic-release
   - provider: pages
+    cleanup: false
     keep_history: true
     github_token: $GH_TOKEN
     on: