Add .yarnignore to ignored filenames list in pack (#465)
Add .yarnignore to ignored filenames list in pack (#465)


kasperlewau/yarn,ConAntonakos/yarn,andreypopp/esy,bsansouci/esy,lawliet89/yarn,dguo/yarn,FLGMwt/yarn,dxu/yarn,dguo/yarn,onemen/yarn,andreypopp/esy,bsansouci/esy,MiguelAlho/yarn,troydemonbreun/yarn,onemen/yarn,joeyespo/yarn,seripap/emojiless-yarn,suitupalex/yarn,mourner/yarn,mgcrea/yarn,mvestergaard/yarn,seripap/emojiless-yarn,andreypopp/esy,CHECK24/yarn,lawliet89/yarn,mourner/yarn,kasperlewau/yarn,FLGMwt/yarn,suitupalex/yarn,ConAntonakos/yarn,joeyespo/yarn,bsansouci/esy,CHECK24/yarn,MiguelAlho/yarn,dxu/yarn,mvestergaard/yarn,troydemonbreun/yarn,mgcrea/yarn