Fix MSVC max macro collision in sql_numeric

Author: Pierre-Luc Gagné

lib/include/ds_mysql/sql_numeric.hpp

@@ -10,7 +10,7 @@ namespace ds_mysql {
 
 namespace detail {
 
-inline constexpr uint32_t unspecified_numeric_scale = std::numeric_limits<uint32_t>::max();
+inline constexpr uint32_t unspecified_numeric_scale = (std::numeric_limits<uint32_t>::max)();
 
 template <typename Derived, typename Repr>
 struct formatted_numeric_base {