Use Qt::Literals::StringLiterals

src/covermanager/discogscoverprovider.cpp

@@ -50,7 +50,7 @@
 #include "jsoncoverprovider.h"
 #include "discogscoverprovider.h"
 
-using namespace Qt::StringLiterals;
+using namespace Qt::Literals::StringLiterals;
 using std::make_shared;
 
 const char *DiscogsCoverProvider::kUrlSearch = "https://api.discogs.com/database/search";