fix npm ERR! cb() never called! and resulting problems with gulp

[gruppjo]

npm WARN engine [email protected]: wanted: {"node":">=0.6","npm":"1"} (current: {"node":"0.10.35","npm":"2.1.18"})
npm ERR! cb() never called!

further investigation

npm WARN engine [email protected]: wanted: {"node":">=0.6","npm":"1"} (current: {"node":"0.10.35","npm":"2.3.0"})
npm WARN optional dep failed, continuing [email protected]
npm WARN optional dep failed, continuing [email protected]
npm WARN optional dep failed, continuing [email protected]
npm WARN optional dep failed, continuing [email protected]
npm ERR! Darwin 14.3.0
npm ERR! argv "node" "/usr/local/bin/npm" "install"
npm ERR! node v0.10.35
npm ERR! npm  v2.3.0
npm ERR! path /Users/jonathan/Projects/play/test/node_modules/gulp/node_modules/gulp-util
npm ERR! code EMFILE
npm ERR! errno 20

npm ERR! EMFILE, readdir '/Users/jonathan/Projects/play/test/node_modules/gulp/node_modules/gulp-util'
npm ERR! 
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

[gruppjo]

this seemed to help - sindresorhus/gulp-imagemin#10 (comment)