v0.18.0

Changes between ifm3d 0.17.0 and 0.18.0

• Support for latest O3D3XX firmware (1.30.5309)
• Support for latest O3X firmware (1.0.156)
• Deprecated ROS-specific apt repositories
• Deprecated python2 support
• Support for Ubuntu 20.04 Focal Fossa
• Packaged and released ifm3d as a Snap
• Added support for Ubuntu ARM64
• Added support for L4T (Linux for Tegra) JetPack 4.3 and 4.4
• Improved Windows build instructions
• Created GitHub Actions CI workflows
• Bugfixes:
  • #190 - Added missing include for Windows build