Added auto-merge workflow for dependabot

.github/workflows/go.yml

@@ -20,3 +20,17 @@ jobs:
         run: go build -v .
       - name: Test
         run: go test -v -race .
+
+  auto-merge:
+    name: Auto merge
+    runs-on: ubuntu-latest
+    needs:
+      - all
+      - other
+      - required
+      - jobs
+    steps:
+      - name: Auto merge
+        uses: ridedott/dependabot-auto-merge-action@master
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}