Compile with Qt 5.14

Should hopefully fix the CI build.

autotests/selectjobtest.cpp

@@ -185,7 +185,10 @@ private Q_SLOTS:
             if (!modified.isEmpty()) {
                 Messages collectedModified;
                 for (const auto &modifiedSpyCatch : modifiedSpy) {
-                    collectedModified.insert(modifiedSpyCatch.at(0).value<Messages>());
+                    const auto msgs = modifiedSpyCatch.at(0).value<Messages>();
+                    for (auto it = msgs.begin(); it != msgs.end(); ++it) {
+                        collectedModified.insert(it.key(), it.value());
+                    }
                 }
 
                 QCOMPARE(collectedModified, modified);