Update publish.yml

Author: kmcquade

.github/workflows/publish.yml

@@ -88,3 +88,29 @@ jobs:
           git add .
           git commit -m "update brew formula" policy_sentry/bin/cli.py HomebrewFormula/policy_sentry.rb || echo "No brew changes to commit"
           git push -u origin master
+
+  bump-version:
+    needs: update-brew
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          ref: master
+
+      - name: Bump version
+        run: |
+          version_file="policy_sentry/bin/version.py"
+
+          git config --local user.email "action@github.com"
+          git config --local user.name "GitHub Action"
+          git fetch --tags
+          git pull origin master
+          latest_tag=$(git describe --tags `git rev-list --tags --max-count=1`)
+          echo "latest tag: $latest_tag"
+          new_tag=$(echo $latest_tag | awk -F. -v a="$1" -v b="$2" -v c="$3" '{printf("%d.%d.%d", $1+a, $2+b , $3+1)}')
+          echo "new tag: $new_tag"
+
+          printf "# pylint: disable=missing-module-docstring\n__version__ = '$new_tag'""" > $version_file
+
+          git commit -m "Bump to ${new_tag}"  $version_file || echo "No changes to commit"
+          git push origin