update semver, optimist, and tilelive-mapnik
update semver, optimist, and tilelive-mapnik

Zhao-Qi/tilemill,paulovieira/tilemill-clima,fxtentacle/tilemill,tizzybec/tilemill,tizzybec/tilemill,tilemill-project/tilemill,florianf/tileoven,tilemill-project/tilemill,fxtentacle/tilemill,nyimbi/tilemill,MappingKat/tilemill,fxtentacle/tilemill,fxtentacle/tilemill,MappingKat/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,Zhao-Qi/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,florianf/tileoven,nyimbi/tilemill,paulovieira/tilemill-clima,Teino1978-Corp/Teino1978-Corp-tilemill,nyimbi/tilemill,Teino1978-Corp/Teino1978-Corp-tilemill,florianf/tileoven,MappingKat/tilemill,Zhao-Qi/tilemill,fxtentacle/tilemill,mbrukman/tilemill,tizzybec/tilemill,mbrukman/tilemill,mbrukman/tilemill,mbrukman/tilemill,nyimbi/tilemill,paulovieira/tilemill-clima,paulovieira/tilemill-clima,Zhao-Qi/tilemill,Zhao-Qi/tilemill,tizzybec/tilemill,tilemill-project/tilemill,mbrukman/tilemill,tizzybec/tilemill,nyimbi/tilemill,MappingKat/tilemill,MappingKat/tilemill,paulovieira/tilemill-clima