feat(ci): add a workflow to run cargo audit

Signed-off-by: Tarek <tareknaser360@gmail.com>

.github/workflows/audit.yml

@@ -0,0 +1,28 @@
+name: Cargo Audit
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+  schedule:
+    - cron: "30 1 1,15 * *"
+
+jobs:
+  cargo_audit:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+
+      - name: Install cargo audit
+        run: cargo install --locked cargo-audit
+
+      - name: Run cargo audit
+        run: cargo audit