Add includes so Chatterino compiles without PCH (#3308)

src/common/Args.cpp

@@ -10,6 +10,7 @@
 #include <QApplication>
 #include <QCommandLineParser>
 #include <QDebug>
+#include <QRegularExpression>
 #include <QStringList>
 #include <QUuid>
 

src/common/Common.hpp

@@ -4,6 +4,7 @@
 #include <QWidget>
 #include <boost/optional.hpp>
 #include <boost/preprocessor.hpp>
+#include <memory>
 #include <string>
 
 #include "common/Aliases.hpp"