v2.1.0

Added

• Accept special initial conversation current in <ConversationsSelect> (#154, #155)

Changed

• Upgrade Node and dependent packages to the latest version (#158)
• Refactor special link detection (#159)
• Update demo REPL (#157)
  • Move template examples on README into REPL demo
  • Use Web fonts to get better rendering
  • Disable preview button if Slack may return 414 error due to too long URL