V0.2.1: Rio

Added

• The Anchor IDL data structure is now generated for every Solana contract, although the actual IDL json file is not yet saved.
  LucasSte

Changed

• The Solana target now utilizes eight byte Anchor discriminators for function dispatch instead
  of the four byte Ethereum selectors. LucasSte
• The deployment of contracts on Solana now follows the same scheme as Anchor. seanyoung
• Compares between rational literals and integers are not allowed. seanyoung
• Overriding the function selector value is now done using the @selector([1, 2, 3, 4])
  syntax, and the old syntax selector=hex"12345678" has been removed.
• msg.sender was not implemented correctly on Solana, and
  has now been removed.
  seanyoung
• Solang now uses LLVM 14. LucasSte

Fixed

• Many bugs have been fixed by seanyoung, LucasSte
  and xermicus