runtime: Use fable::parse_json instead of Json::parse

Author: cassava

runtime/include/cloe/handler.hpp

@@ -150,7 +150,7 @@ class Request {
   /**
    * Helper method that tries to convert the body to a JSON object.
    */
-  virtual Json as_json() const { return Json::parse(body()); }
+  virtual Json as_json() const { return fable::parse_json(body()); }
 };
 
 /**

runtime/include/cloe/utility/resource_handler.hpp

@@ -88,7 +88,7 @@ class ResourceHandler {
  */
 void to_json(cloe::Json& j, const ResourceLoader& c) {
   try {
-    j = cloe::Json::parse(c.to_string());
+    j = fable::parse_json(c.to_string());
   } catch (cloe::Json::type_error& e) {
     j = {c.res_.filepath(), c.to_string()};
   }

runtime/src/cloe/handler.cpp

@@ -103,7 +103,7 @@ void FromConf::operator()(const cloe::Request& q, cloe::Response& r) {
       if (convert_ && !q.query_map().empty()) {
         Json j;
         for (auto const& kv : q.query_map()) {
-          j[kv.first] = Json::parse(kv.second);
+          j[kv.first] = fable::parse_json(kv.second);
         }
         try {
           ptr_->from_conf(Conf{q.as_json()});