Duplicated packages in the prod build

[cherifGsoul]

The issue was originally reported by @bmomberger-bitovi on slack:

I was tinkering with canjs/canjs on my day off and I noticed that there were a few duplicated packages in 
the prod build. One is two copies of can-validate-validatejs

Castiel-2:canjs bmomberger$ npm ls --prod can-validate-validatejs
can@6.4.0 /Users/bmomberger/Projects/canjs
├─┬ can-define-validate-validatejs@1.1.1
│ └── can-validate-validatejs@0.1.3 
└── can-validate-validatejs@1.0.1 

Also:

The others are from unmaintained feathers packages that we’re using in can-connect-feathers, 
and I’m not sure what to do about those. 

Castiel-2:canjs bmomberger$ npm ls --prod debug
can@6.4.0 /Users/bmomberger/Projects/canjs
└─┬ can-connect-feathers@7.0.0
  ├─┬ @feathersjs/errors@4.5.3
  │ └── debug@4.1.1 
  └─┬ feathers-authentication-popups@0.1.2
    ├── debug@2.6.9 
    └─┬ feathers-errors@2.9.2
      └── debug@3.2.6 
Castiel-2:canjs bmomberger$ npm ls --prod ms
can@6.4.0 /Users/bmomberger/Projects/canjs
└─┬ can-connect-feathers@7.0.0
  ├─┬ @feathersjs/errors@4.5.3
  │ └─┬ debug@4.1.1
  │   └── ms@2.1.2 
  └─┬ feathers-authentication-popups@0.1.2
    ├─┬ debug@2.6.9
    │ └── ms@2.0.0 
    └─┬ feathers-errors@2.9.2
      └─┬ debug@3.2.6
        └── ms@2.1.2  deduped

[cherifGsoul]

There's a Greenkeeper PR to upgrade can-validate-validatejs can-define-validate-validatejs, I checked it and it doesn't break.