Map number to double time since float is also parsed as double in Qt5 C++ (#3046)

Author: etherealjoy

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQt5AbstractCodegen.java

@@ -78,6 +78,7 @@ public CppQt5AbstractCodegen() {
         typeMapping.put("integer", "qint32");
         typeMapping.put("long", "qint64");
         typeMapping.put("boolean", "bool");
+        typeMapping.put("number", "double");        
         typeMapping.put("array", "QList");
         typeMapping.put("map", "QMap");
         typeMapping.put("object", PREFIX + "Object");