1.0.7

This update introduces new handlers and minor bug fixes

Added

• Added TelegramHandler & TelegramConfiguration for pushing log events to a Telegram chat/topic using a bot, filtered
  to ERR and CRT events by default
• Added EmailHandler & EmailConfiguration for sending log events as emails using SMTP (with optional STARTTLS/TLS
  and authentication), filtered to ERR and CRT events by default
• Added DiscordHandler & DiscordConfiguration for posting log events to a Discord channel/thread using a webhook,
  filtered to ERR and CRT events by default

Changed

• Log handlers are now isolated from each other, a handler that throws is disabled for that logger instance and the
  failure is reported once via error_log() instead of propagating to the caller or preventing other handlers from
  receiving the event
• Events raised while another event is being handled (e.g. PHP warnings emitted by a handler) are dropped to prevent
  infinite recursion
• EmailHandler's timeout now applies to the whole SMTP session rather than each reply

Fixed

• Logger::getAvailability() reported the descriptor handler under DescriptorConfiguration::class instead of
  DescriptorHandler::class
• The shutdown handler registered by Logger::registerHandlers() reported the last error of the request as critical
  even when it was a non-fatal error (e.g. a warning) that had already been logged, it now only reports fatal errors