Log Message:
Update lang/qore to version 1.18.0

Changes from release notes;

* implemented options to allow some badly-formatted Swagger parsing
  that allows schemas with issues to be parsed
* HTTP connections have no default connect timeout
* implemented an initial EmpathicBuildingDataProvider module
* fixed date subtraction when the RHS is 1970-01-01Z
* Fix compilation of QoreEllipsesNode during non-scu build
* verify connection option values against allowed_values and enforce
  in the constructor
* fixed a bug where the HttpConnection scheme could not be used