Stability

Added

• ExW3.get_logs/2

Changes

• Refactor library to use a main facade and separate utility modules
• Support HTTP url option in ExW3.accounts/1, ExW3.balance/2, ExW3.block_number/1
• Switch CI from Travis to Github Actions
• Fix encode_event
• Fix load_abi
• Fix load_bin
• Fix Contract.at clearing registered state
• Fix to_checksum_address

Breaking Changes

• Return :ok/:error tuple from ExW3.block_number/1