ci(actions): add 'skip-duplicate-actions' to prevent duplicate builds

Author: jrolfs

.github/workflows/build.yml

@@ -10,9 +10,20 @@ on:
       - beta
 
 jobs:
+  deduplicate:
+    runs-on: ubuntu-latest
+    outputs:
+      should_skip: ${{ steps.skip_check.outputs.should_skip }}
+    steps:
+      - id: skip_check
+        uses: fkirc/skip-duplicate-actions@master
+        with:
+          concurrent_skipping: same_content_newer
+
   build:
     name: Build + Test + Release
     runs-on: ubuntu-latest
+    if: ${{ needs.deduplicate.outputs.should_skip != 'true' }}
 
     steps:
       - name: Get Yarn cache path