v0.8.4 🌈

Changes

• Update initialization.rst @SunsetWolf (#941)
• Bump numpy from 1.17.4 to 1.21.0 in /examples/benchmarks/TabNet @dependabot (#898)
• Bump numpy from 1.17.4 to 1.21.0 in /examples/benchmarks/Transformer @dependabot (#897)
• Bump numpy from 1.17.4 to 1.21.0 in /examples/hyperparameter/LightGBM @dependabot (#896)
• Bump numpy from 1.17.4 to 1.21.0 in /examples/benchmarks/XGBoost @dependabot (#895)

🌟 Features

• [949] - Remove argument internal in BaseRun::download_data. @ChiahungTai (#953)
• Fix error message in position.py @cuicorey (#922)
• Fix wrong error messages. @ChiahungTai (#946)
• [931] Remove mutable default argument. @ChiahungTai (#932)
• performance mprovement @you-n-g (#921)
• Add data analysis feature for report @you-n-g (#918)
• Enhance pytorch nn @you-n-g (#917)
• Fix pylint @SunsetWolf (#888)
• Add more docs about initialization @you-n-g (#880)
• Make the logic of handler Clear @you-n-g (#877)

🐛 Bug Fixes

• fix bug @wan9c9 (#950)
• [930] Fix typo HasingStockStorage to HashingStockStorage. @ChiahungTai (#947)
• Support Reweighter for HighFreq Model @you-n-g (#908)
• add weight param @aurora5161 (#907)
• fix workflow bug @you-n-g (#882)

📚 Documentation

• Update Metric Explanation @you-n-g (#920)
• Add data analysis feature for report @you-n-g (#918)
• Update README.md @wendili-cs (#915)
• Some links about high-frequency trading @you-n-g (#884)
• Update Portfolio README.md @you-n-g (#900)
• Update Benchmark Docs @you-n-g (#899)
• Docs improvement of backtest @you-n-g (#885)
• Update handler processors docs @you-n-g (#879)
• expression example @you-n-g (#887)
• Docs to get original price @you-n-g (#878)