add security CI

.github/workflows/security_audit.yml

@@ -0,0 +1,14 @@
+name: Security audit
+on:
+  push:
+    paths:
+      - '**/Cargo.toml'
+      - '**/Cargo.lock'
+jobs:
+  security_audit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions-rs/audit-check@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}

Cargo.toml

@@ -47,4 +47,4 @@ tokio-util = { version = "0.6", features = [ "codec" ] }
 url = { version = "2", features = [ "serde" ] }
 
 [build-dependencies]
-vergen = "5"
+vergen = "5"