v0.2.0

In this release, we have upgraded to Rust 2018. We also did 2 important refactoring:

• The miner now runs as a separate process.
• We have revised the VM syscalls according to VM contracts design experiments.

Bug Fixes

• fix IBD sync process (8c8382a)
• fix missing output lock hash (#46) (51b1675)
• fix network unexpected connections to self (#21) (f4644b8)
• fix syscall number (c21f5de)
• fix syscall length calculation (#82) (fb23f33)
• in case of missing cell, return ITEM_MISSING error instead of halting (707d661)
• remove hash caches to avoid JSON deserialization bug (#84) (1274b03)
• fix rpc_url (62e784f)
• resolve mining old block issue (#87) (01e02e2)
• uncheck subtract overflow (#88) (2b0976f)

Features

• refactor: embrace Rust 2018 (#75) (313b2ea)
• refactor: replace ethereum-types with numext (2cb8aca)
• refactor: rpc and miner (#52) (7fef14d)
• refactor: VM syscall refactoring (9573905)
• add get_current_cell rpc for fetching unspent cells (781d5f5)
• add LOAD_INPUT_BY_FIELD syscall (c9364f2)
• add new syscall to fetch current script hash (#42) (d4ca022)
• dockerfile for hub (#48) (f93e1da)
• print full config error instead of just description (#23) (b7d092c)

BREAKING CHANGES

• Miner is a separate process now, which must be started to produce new
  blocks.

• The project now uses Rust 2018 edition, and the stable toolchain has to be
  reinstalled:

  rustup self update
  rustup toolchain uninstall stable
  rustup toolchain install stable
  

  If you still cannot compile the project, try to reinstall rustup.