add travis deployment

.travis.yml

@@ -97,3 +97,25 @@ matrix:
         - rm -f stone-phaser-"$_BUILD"/README
         - install -d release
         - zip -9 -r release/stone-phaser-"$_BUILD".zip stone-phaser-"$_BUILD"
+
+before_deploy:
+  - |
+    if test "$TRAVIS_BRANCH" = "master" -a "$TRAVIS_PULL_REQUEST" = "false"; then
+      export TRAVIS_TAG=automatic
+      git tag -f "$TRAVIS_TAG"
+    fi
+
+deploy:
+  provider: releases
+  api_key: "$GITHUB_TOKEN"
+  file: release/*
+  file_glob: true
+  skip_cleanup: true
+  prerelease: true
+  overwrite: true
+  on:
+    branch: master
+
+env:
+  global:
+    secure: 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