Errors when trying to compile with -std=gnu++20

[russkel]

I came across these when trying to compile xtypes components when using it in a project that is C++20 on gcc 11:

https://github.com/eProsima/xtypes/blob/main/include/xtypes/DynamicDataImpl.hpp#L145

xtypes/include/xtypes/DynamicDataImpl.hpp:145:49: error: overload resolution selected deleted operator '<<' [clang-diagnostic-error]
                ss << "<" << type_name << ">  " << node.data().value<char16_t>();

https://github.com/eProsima/xtypes/blob/main/include/xtypes/StringType.hpp#L112

xtypes/include/xtypes/StringType.hpp:112:70: error: use 'template' keyword to treat 'basic_string' as a dependent template name [clang-diagnostic-error]
        reinterpret_cast<std::basic_string<CHAR_T>*>(instance)->std::basic_string<CHAR_T>::~basic_string<CHAR_T>();

[MiguelBarro]

Please check this is fixed in #113

[russkel]

It is fixed @MiguelBarro