Update Massive.Sqlite.cs

Added a `using` statement wrapping the DbDataReader missing in: 
`public virtual IEnumerable<dynamic> Query(string sql, params object[] args)` 
which was appearing in its overload `public virtual IEnumerable<dynamic> Query(string sql, DbConnection connection, params object[] args)`.

This caused `database locked` errors when you executed a query followed immediately by an `INSERT` to the database in methods using this `Query`'s overflow.

For example, using `First`:
var obj = table.First().id;
table.Insert(...);
will yield a `database locked` error.

The other overload of Query has it so I assumed it must has been forgotten.