Version 0.1.8 Release

What's Changed

• [FIX] Update requirements by @ZhuochengZhang98 in #18
• [FEAT] Optimize LoggerManager & RAGEvalDataset by @ZhuochengZhang98 in #20
• [FEAT] Add chunking methods by @ZhuochengZhang98 in #22
• [DOC] Optimize document by @ZhuochengZhang98 in #23

Full Changelog: 0.1.7...0.1.8