qlib v0.9.5

Changes

• data_collector: cn_index: fix missing dependencies package in requirements.txt @feilongfl (#1770)
• bump version @SunsetWolf (#1784)

🐛 Bug Fixes

• fix get data error @SunsetWolf (#1793)
• Fix the bug of reading string NA as NaN in the function exists_qlib_data. @OzzyXu (#1736)

📚 Documentation

• fix get data error @SunsetWolf (#1793)
• fix document @SunsetWolf (#1788)
• fix docs @SunsetWolf (#1721)

🧹 Maintenance

• Delete redundant copy() code to speed up @playfund (#1732)
• Update dump_pit.py @eltociear (#1759)
• Fix issue 1729 @SunsetWolf (#1776)