Auto-merge on minor releases

Issue gh-11

Author: sjohnr

.github/workflows/auto-merge-dependabot-pr.yml

@@ -17,7 +17,7 @@ jobs:
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
       - name: Enable auto-merge for Dependabot PRs
-        if: ${{ steps.dependabot-metadata.outputs.update-type == 'version-update:semver-patch' }}
+        if: ${{ steps.dependabot-metadata.outputs.update-type == 'version-update:semver-minor' }}
         env:
           PR_URL: ${{github.event.pull_request.html_url}}
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}