PHP Web3 Client

TODO:

• Contract event
• Optimize websocket provider
• Add tests
• Refactor websocket utils by using request id
• Json utils
• Web3 console
• Event system
• Custom log handle
• Hex util to library
• Provide/Inject system
• using guzzle psr7
• rlp encode decode
• jsonrpc to library
• batch request support multidimension by using dot or other methods
• auto return request when call in function need request