Update python-publish.yml

Author: y1xiaoc

.github/workflows/python-publish.yml

@@ -17,6 +17,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+    - name: Get history and tags for SCM versioning to work
+      run: |
+        git fetch --prune --unshallow
+        git fetch --depth=1 origin +refs/tags/*:refs/tags/*
     - name: Set up Python
       uses: actions/setup-python@v2
       with: