removed const in get_ptr() by accident
removed const in get_ptr() by accident

Newbrick/json,stanmihai4/json,stanmihai4/json,nlohmann/json,theodelrieu/json,robertmrk/json,stanmihai4/json,hunter-packages/json,hunter-packages/json,kaidokert/json,nlohmann/json,nlohmann/json,whackashoe/json,hunter-packages/json,Newbrick/json,kaidokert/json,whackashoe/json,Newbrick/json,theodelrieu/json,kaidokert/json