Merge pull request #582 from nathanwhit/bors

Create single Github actions job to gate bors on

.github/workflows/ci.yml

@@ -111,3 +111,23 @@ jobs:
 
       - name: Build Chalk book
         run: cd book && ./mdbook build
+
+  end-success:
+    name: bors build finished
+    if: success()
+    runs-on: ubuntu-latest
+    needs: [test, fmt]
+
+    steps:
+      - name: Mark the job as successful
+        run: exit 0
+
+  end-failure:
+    name: bors build finished
+    if: "!success()"
+    runs-on: ubuntu-latest
+    needs: [test, fmt]
+
+    steps:
+      - name: Mark the job as a failure
+        run: exit 1