Sqlite: Improve Sqlite wrapper

It is now possible to read values at once.

for (auto [name, value] : statement.tupleValues<String, int>(1000, "foo", 20))
   ....

Change-Id: I3d4bc5218810b4620e1df625126aa490f30bbc71
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

tests/unit/unittest/sqlitedatabase-test.cpp

@@ -38,6 +38,9 @@ namespace {
 
 using testing::Contains;
 
+using Sqlite::ColumnType;
+using Sqlite::JournalMode;
+using Sqlite::OpenMode;
 using Sqlite::SqliteTable;
 
 class SqliteDatabase : public ::testing::Test