Use Qt::Literals::StringLiterals

src/dialogs/about.cpp

@@ -36,7 +36,7 @@
 #include "about.h"
 #include "ui_about.h"
 
-using namespace Qt::StringLiterals;
+using namespace Qt::Literals::StringLiterals;
 
 About::About(QWidget *parent) : QDialog(parent), ui_{} {
 

src/dialogs/edittagdialog.cpp

@@ -100,7 +100,7 @@
 #include "edittagdialog.h"
 #include "ui_edittagdialog.h"
 
-using namespace Qt::StringLiterals;
+using namespace Qt::Literals::StringLiterals;
 
 namespace {
 constexpr char kTagsDifferentHintText[] = QT_TR_NOOP("(different across multiple songs)");

src/dialogs/errordialog.cpp

@@ -35,7 +35,7 @@
 #include "errordialog.h"
 #include "ui_errordialog.h"
 
-using namespace Qt::StringLiterals;
+using namespace Qt::Literals::StringLiterals;
 
 ErrorDialog::ErrorDialog(QWidget *parent)
     : QDialog(parent),

src/dialogs/snapdialog.cpp

@@ -25,7 +25,7 @@
 #include "snapdialog.h"
 #include "ui_messagedialog.h"
 
-using namespace Qt::StringLiterals;
+using namespace Qt::Literals::StringLiterals;
 
 SnapDialog::SnapDialog(QWidget *parent) : MessageDialog(parent) {