v1.11.0

• Fixed: ContextClickHouseClient rounded the remaining budget up to whole
  seconds (1.2 s left became 2 s), and turned a configured
  max_execution_time => 0 (unlimited) into 1 second. The budget is now passed
  in fractional seconds; a looser or unlimited configured value is replaced
  by it (#41).
• Fixed: a deadline passing between the check and reading the budget could
  produce max_execution_time = 0, i.e. unlimited; the budget is now read
  before the check.
• Added: ContextClickHouseClient sets
  cancel_http_readonly_queries_on_client_close=1 unless the caller set it, so
  the server stops a read-only query when the HTTP client gives up (#42).