Add a new function to query details on a smart contract

[next-game-solutions]

/api/contract
Desc: Get a single contract's detail
Demo: curl -X Get https://apilist.tronscan.org/api/contract?contract=TEEXEWrkMFKapSMJ6mErg39ELFKDqEs6w3
@param contract: contract address;
@return: a contract detail info;