Log Message:
Update qore-json-module to version 1.5.

Patches have been applied upstream.

Release notes:

 * serialize binary values as base64-encoded strings
 * user modules moved to top-level qore module directory from
   version-specific module directory since they are valid for multiple
   versions of qore
 * serialize nan, +/-inf as null according to the JSON spec
 * added detection for invalid JSON-RPC calls and added a more
   user-friendly error message in the JsonRpcHandler module
 * new functions added conforming to Qore's function naming convention,
   old camel-case functions deprecated
 * JSON tests ported to QUnit
 * Qore 0.8.12 required as a minimum to build
 * JSON output is more compact; fewer extransous whitespaces are used