Automatically messages #releases upon a new release

.github/workflows/release.yml

@@ -67,4 +67,19 @@ jobs:
           token: ${{ secrets.HOMEBREW_UTILITY_ACCOUNT }}
           repository: opticdev/homebrew-optic
           event-type: version-update
-          client-payload: '{"ref": "${{ github.ref }}", "sha": "${{ github.sha }}"}'
+          client-payload: '{"ref": "${{ github.ref }}", "sha": "${{ github.sha }}"}'
+
+  # Tells slack a release has happened
+  notify-slack:
+    runs-on: ubuntu-latest
+    # needs: release-npm
+    name: Message Slack that Release has happened
+    steps:
+      - uses: actions/setup-node@v2-beta
+        name: Setup Node (to determine latest version of Optic)
+        with:
+            node-version: 12
+      - run: echo ::set-env name=MESSAGE::"${{ github.event.pusher.name }} released version $(npm view @useoptic/cli version) \n Publish Release Notes <https://github.com/opticdev/optic/releases|here>"
+      - name: Send message to Slack API
+        run: |
+          curl -X POST -H 'Content-type: application/json' --data '{"text":"${{ env.MESSAGE }}"}' ${{ secrets.SLACK_WEBHOOK_URL }}