v2.0.0

• Add faster Numba functions for matching and distance metrics
• More robust tracking
  • Average feature
  • Invalidate feature during occlusion
  • Cascaded association with age
  • Duplicate tracks merging and removal
  • Greedy matching for ReID
• Restructure API
  • Add a buffer to save past bounding boxes in Track class
  • Add frame count properties in Track class
  • Allow subclassing base models outside FastMOT for custom models
  • Documentations for all parameters
  • Visualization options in mot.json config
  • Rename a few parameters to be more intuitive
• Remove cython-bbox dependency
• YOLO plugin TensorRT 8 support