Made npm test work on windows w/ MSYS.
Made npm test work on windows w/ MSYS.

see a similar fix here:
https://github.com/amber-smalltalk/amber/pull/406/files

Icenium/tern,eranif/tern,neoclide/tern,albertinad/tern,mcanthony/tern,adrianton3/tern,othree/tern,MarcelGerber/tern,rustemferreira/tern,fileability/tern,jgiles/tern,cdosborn/tern,Icenium/tern,dorellang/tern,fileability/tern,fileability/tern,marijnh/tern,jgiles/tern,ternjs/tern,albertinad/tern,eranif/tern,Icenium/tern,adrianton3/tern,othree/tern,talyian/tern,talyian/tern,emallson/tern,emacsmirror/tern,angelozerr/tern,MarcelGerber/tern,neoclide/tern,anandthakker/tern,cdosborn/tern,marijnh/tern,albertinad/tern,messfairy/tern,cloud9ide/tern,MarcelGerber/tern,messfairy/tern,angelozerr/tern,talyian/tern,cdosborn/tern,anandthakker/tern,eranif/tern,messfairy/tern,ternjs/tern,adrianton3/tern,marijnh/tern,emacsmirror/tern,mcanthony/tern,othree/tern,dorellang/tern,dorellang/tern,emallson/tern,neoclide/tern,rustemferreira/tern,anandthakker/tern,jgiles/tern,ternjs/tern,rustemferreira/tern,cloud9ide/tern,emacsmirror/tern,emallson/tern,mcanthony/tern