Address some fallout from Qt6 metatype changes

Emphasis on 'some'. Only did what came up as deprecation warnings.

src/protobuf/qprotobufserializer.cpp

@@ -258,7 +258,7 @@ int QProtobufSerializerPrivate::skipSerializedFieldBytes(QProtobufSelfcheckItera
 QByteArray QProtobufSerializerPrivate::serializeProperty(const QVariant &propertyValue, const QProtobufMetaProperty &metaProperty)
 {
     qProtoDebug() << __func__ << "propertyValue" << propertyValue << "fieldIndex" << metaProperty.protoFieldIndex()
-                  << static_cast<QMetaType::Type>(propertyValue.type());
+                  << propertyValue.metaType().name();
 
     QByteArray result;
     WireTypes type = UnknownWireType;

tests/test_protobuf/simpletest.cpp.inc

@@ -199,7 +199,7 @@ TEST_F(SimpleTest, SimpleStringMessageTest)
     const char *propertyName = "testFieldString";
     SimpleStringMessage test;
     int propertyNumber = SimpleStringMessage::propertyOrdering.at(6); //See simpletest.proto
-    ASSERT_EQ(SimpleStringMessage::staticMetaObject.property(propertyNumber).type(), QMetaType::QString);
+    ASSERT_EQ(SimpleStringMessage::staticMetaObject.property(propertyNumber).metaType(), QMetaType(QMetaType::QString));
     ASSERT_STREQ(SimpleStringMessage::staticMetaObject.property(propertyNumber).name(), propertyName);
     ASSERT_TRUE(test.setProperty(propertyName, QVariant::fromValue(QString("test1"))));
     ASSERT_STREQ(test.property(propertyName).toString().toStdString().c_str(), "test1");
@@ -213,7 +213,7 @@ TEST_F(SimpleTest, SimpleFloatMessageTest)
     const char *propertyName = "testFieldFloat";
     SimpleFloatMessage test;
     int propertyNumber = SimpleFloatMessage::propertyOrdering.at(7); //See simpletest.proto
-    ASSERT_EQ(SimpleFloatMessage::staticMetaObject.property(propertyNumber).type(), QMetaType::Float);
+    ASSERT_EQ(SimpleFloatMessage::staticMetaObject.property(propertyNumber).metaType(), QMetaType(QMetaType::Float));
     ASSERT_STREQ(SimpleFloatMessage::staticMetaObject.property(propertyNumber).name(), "testFieldFloat");
 
     float assignedValue = 1.55f;
@@ -229,7 +229,7 @@ TEST_F(SimpleTest, SimpleDoubleMessageTest)
     const char *propertyName = "testFieldDouble";
     SimpleDoubleMessage test;
     int propertyNumber = SimpleDoubleMessage::propertyOrdering.at(8); //See simpletest.proto
-    ASSERT_EQ(SimpleDoubleMessage::staticMetaObject.property(propertyNumber).type(), QMetaType::Double);
+    ASSERT_EQ(SimpleDoubleMessage::staticMetaObject.property(propertyNumber).metaType(), QMetaType(QMetaType::Double));
     ASSERT_STREQ(SimpleDoubleMessage::staticMetaObject.property(propertyNumber).name(), propertyName);
 
     double assignedValue = 0.55;
@@ -369,7 +369,7 @@ TEST_F(SimpleTest, SimpleBytesMessageTest)
     const char *propertyName = "testFieldBytes";
     SimpleBytesMessage test;
     int propertyNumber = SimpleBytesMessage::propertyOrdering.at(1); //See simpletest.proto
-    ASSERT_EQ(SimpleBytesMessage::staticMetaObject.property(propertyNumber).type(), QMetaType::QByteArray);
+    ASSERT_EQ(SimpleBytesMessage::staticMetaObject.property(propertyNumber).metaType(), QMetaType(QMetaType::QByteArray));
     ASSERT_STREQ(SimpleBytesMessage::staticMetaObject.property(propertyNumber).name(), propertyName);
     ASSERT_TRUE(test.setProperty(propertyName, QVariant::fromValue<QByteArray>("\x01\x02\x03\x04\x05")));
     ASSERT_TRUE(test.property(propertyName).toByteArray() == QByteArray("\x01\x02\x03\x04\x05"));