Add support for "Netherlands Antilles" country

[dusanpetkovicdsaga]

Report a bug:

Adding alpha2 code for NA (Netherlands Antilles)

returns the following error:

index.js:1 Warning: Failed prop type: Invalid prop code of value an supplied to FlagIcon, expected one of:
["af","ax","al","dz","as","ad","ao","ai","aq","ag","ar","am","aw","au","at","az","bs","bh","bd","bb","by","be","bz","bj","bm","bt","bo","bq","ba","bw","bv","br","io","bn","bg","bf","bi","kh","cm","ca","cv","es-ct","ky","cf","td","cl","cn","cx","cc","co","km","cg","cd","ck","cr","ci","hr","cu","cw","cy","cz","dk","dj","dm","do","ec","eg","sv","gq","er","ee","et","eu","fk","fo","fj","fi","fr","gf","pf","tf","ga","gm","ge","de","gh","gi","gr","gl","gd","gp","gu","gt","gg","gn","gw","gy","ht"," ...