Be explicit with file listings

Author: mjackson

.travis.yml

@@ -22,8 +22,10 @@ deploy:
     tags: true
 - provider: releases
   api_key: "$GITHUB_TOKEN"
-  file_glob: true
-  file: build/**
+  file:
+    - "build/$TRAVIS_TAG/win-x64/react-stdio"
+    - "build/$TRAVIS_TAG/linux-x64/react-stdio"
+    - "build/$TRAVIS_TAG/macos/react-stdio"
   skip_cleanup: true
   on:
     tags: true