Constantinople

[dcaoyuan]

EIPs included in Constantinople:

• EIP 145: Bitwise shifting instructions in EVM. c510bc3
• EIP 1014: Skinny CREATE2. a082d0d 33c5e91
• EIP 1052: EXTCODEHASH opcode. e2bd777
• EIP 1283: Net gas metering for SSTORE without dirty maps. dcf8a61
• EIP 1234: Constantinople Difficulty Bomb Delay and Block Reward Adjustment. fc4327f