feat: add release tag workflow (#753)

.github/workflows/release.yml

+name: release tag
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - "python/sglang/version.py"
+  workflow_dispatch:
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    environment: 'prod'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      
+      - name: Get version
+        id: get_version
+        run: |
+          version=$(cat python/sglang/version.py | cut -d'"' -f2)
+          echo "TAG=v$version" >> $GITHUB_OUTPUT
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        with:
+          name: Release ${{ steps.get_version.outputs.TAG }}
+          tag_name: ${{ steps.get_version.outputs.TAG }}

python/pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "sglang"
-version = "0.2.2"
+version = "0.2.3"
 description = "SGLang is yet another fast serving framework for large language models and vision language models."
 readme = "README.md"
 requires-python = ">=3.8"

python/sglang/version.py

-__version__ = "0.2.2"
+__version__ = "0.2.3"