MaartenGr/BERTopic: v0.9.3 - Quickfix

Fix #282, #285, and #288.

• #282
  • As it turns out the old implementation of topic mapping was still found in the transform function
• #285
  • Fix getting all representative docs
• Fix #288
  • A recent issue with the package pyyaml that can be found in Google Colab
• Remove the YAMLLoadWarning each time BERTopic is imported

import yaml
yaml._warnings_enabled["YAMLLoadWarning"] = False