v0.1.10: Barcelona Release

Added

• On Solana, the accounts that were passed into the transactions are listed in
  the tx.accounts builtin. There is also a builtin struct AccountInfo
• A new common subexpression elimination pass was added, thanks to
  LucasSte
• A graphviz dot file can be generated from the ast, using --emit ast-dot
• Many improvements to the solidity parser, and the parser has been spun out
  in it's own create solang-parser.

Changed

• Solang now uses LLVM 13.0, based on the Solana LLVM tree
• The ast datastructure has been simplified.
• Many bugfixes across the entire tree.