Security audit (#25)

# Pull Request

<!-- Provide a general summary of your changes in the title above -->
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## Description

Add security audit and remove `chrono` depencency


## Checklist

- [x] I have self-reviewed my code
- [x] Code follows project's style guidelines
- [x] Tests added and passing
- [x] Documentation updated (if needed)

.github/workflows/audit.yml

@@ -0,0 +1,16 @@
+name: Security audit
+on:
+  schedule:
+    - cron: "0 0 * * *"
+  push:
+    paths:
+      - "**/Cargo.toml"
+      - "**/Cargo.lock"
+jobs:
+  security_audit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: taiki-e/install-action@cargo-deny
+      - name: Scan for vulnerabilities
+        run: cargo deny check advisories

Cargo.toml

@@ -21,7 +21,6 @@ path = "src/lib.rs"
 clap = "4.3.11"
 clap_derive = "4.3.2"
 criterion = "0.5.1"
-chrono = "0.4.26"
 byteorder = "1.4.3"
 num-derive = "0.4.0"
 num-traits = "0.2.16"