check the version against the highest released version

.github/workflows/releaser.yml

@@ -11,6 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     env:
       VERSION: ""
+      HIGHESTRELEASED: ""
     steps:
       - uses: actions/checkout@v2
         with:
@@ -31,7 +32,10 @@ jobs:
       - uses: actions/checkout@v2
       - name: Determine version
         run: echo "VERSION=$(jq -r .version version.json)" >> $GITHUB_ENV
+      - name: Check if this is a new version
+        run: echo "HIGHESTRELEASED=$(go list -m -versions | tr " " "\n" | tail -n 1)" >> $GITHUB_ENV
       - name: "check suggested version against gorelease"
+        if: ${{ env.VERSION != env.HIGHESTRELEASED }}
         run: |
           suggested=$(gorelease | grep Suggested | sed "s/Suggested version: //")
           echo "gorelease suggested: $suggested"
@@ -41,7 +45,7 @@ jobs:
             exit 1
           fi
       - name: Create release
-        if: ${{ github.event_name == 'push' }}
+        if: ${{ github.event_name == 'push' && env.VERSION != env.HIGHESTRELEASED }}
         run: |
           git tag ${{ env.VERSION }}
           git push --tags