1.13.0 ☎️ DSL support and connection improvements

| 📑 Release note 1.13.0 | 📖 Documentation | ⭐️ Star AsusRouter | ⭐️ Home Assistant Integration

🚀 Features

• Added new AsusData.DSL state (by @GaryHuang-ASUS)
• Added DSL endpoint check for the identity
• Improved session management in the connection module
• Improved initialization of the connection module

📦 Dependencies

• Bumped python-dateutil to 2.9.0.post0