add polyfill for Object.assign
add polyfill for Object.assign

pm5/prionailurus,teia-tw/prionailurus,teia-tw/prionailurus,pm5/prionailurus,soidid/prionailurus,soidid/prionailurus,teia-tw/leopard-cat,teia-tw/leopard-cat,teia-tw/leopard-cat,teia-tw/prionailurus,soidid/prionailurus,pm5/prionailurus