ci: set up dependencies in the workflow

.github/workflows/continuous-integration.yml

@@ -2,7 +2,21 @@
 
 name: "build"
 
-on: ["pull_request", "push"]
+on:
+  push:
+    branches:
+      - "main"
+    tags:
+      - "*"
+  pull_request:
+    branches:
+      - "main"
+
+# Cancels all previous workflow runs for the same branch that have not yet completed.
+concurrency:
+  # The concurrency group contains the workflow name and the branch name.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 env:
   COMPOSER_ROOT_VERSION: "1.99.99"
@@ -59,6 +73,7 @@ jobs:
 
   unit-tests:
     name: "Unit Tests"
+    needs: ["coding-standards", "code-coverage"]
     runs-on: "ubuntu-latest"
 
     strategy: