6.0.2

〰️ Changes

• Fix issues related to attachments/files: (@hugoalh)(N/A)
  • "Cannot send an empty message!" were caused by incorrect request header
  • ERR_INVALID_ARG_TYPE were caused by legacy file reader
  • "File is not accessible, exist, and/or readable!" were caused by duplicated path root
• Move to TypeScript based (@hugoalh)(N/A)
• Remove unnecessary codes of variables reassign (@hugoalh)(N/A)
• Update dependencies (@hugoalh)(N/A)