phpxmlrpc-jsonrpc

• bumped the minimum required version of php to 5.4

• bumped the minimum required version of phpxmlrpc/phpxmlrpc to 4.10.1, fixing the Client->call method sometimes returning an xml-rpc response instead of a json-rpc one

• there is support for extra character sets than UTF-8/ISO-8859-1/ASCII when the php mbstring extension is installed, both as internal application charset and as received payload

• fixed: a "null" value was not considered a valid response

• fixed generation of comments server-side and parsing them client-side

• added method PhpJsonRpc::setLogger to allow overtaking the logger for all JsonRpc classes

• made all error messages go through the Logger facility instead of calling directly error_log

• made sure php warnings in method handlers do not disrupt the server even when it has debug level 0 and 1

• multiple fixes to accommodate changes in the phpxmlrpc to 4.10 API, including support for server-side per-method-handler parameter-types declarations and adding httpResponse data to parsed Responses

• fixed one warning with php 8.2 when running a Server

• fixed encoding of DateTime objects with php 5.4 in Encoder::encode

• prefer emitting "Content-type: application/json" to "Content-type: application/json; charset=UTF-8", as per the current RFCs

• fixes to demo files and benchmark.php

• run CI tests also on php 8.3

• BC notes: the Parser::parseRequest and Parser::parseResponse methods now accept (and are called with) a different set of arguments;
  they also return an array instead of true upon success

bumped the minimum required version of phpxmlrpc/phpxmlrpc to 4.9.2