UNMET PEER DEPENDENCY yo@>=1.0.0

[derek-watson]

From feathersjs/feathers#288:

"I'm getting this warning after installing feathers:

└─┬ feathers-cli@1.2.2
  └── UNMET PEER DEPENDENCY yo@>=1.0.0

npm WARN generator-feathers-plugin@0.6.9 requires a peer of yo@>=1.0.0 but none was installed.

Sorry if the fix is obvious, I'm a novice. I haven't been able to find a solution on the internet or by myself (I tried to update feathers-cli and yo manually and stuff like that...)."

[derek-watson]

cc @egonisgone