dropped GCC 4.8 support (due to #110)
dropped GCC 4.8 support (due to #110)

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