Merge branch 'develop' into release-v0.1

Author: shanjiang7

docs/README_contribute.md

@@ -84,4 +84,4 @@ graph_net/
  ├─ paddle/    # PaddlePaddle graph extraction & validation
  ├─ torch/     # PyTorch graph extraction & validation
  ├─ test/      # Unit tests and example scripts
- └─ *.py       # Benchmark & analysis scripts 
+ └─ *.py       # Benchmark & analysis scripts