PeerDep warning + duplicate plugin errors

[StevenLangbroek]

• version: extract-react-intl-0.6.0.tgz#1696c2ce05513d936272af4b6663700df8414b55
• node version: 8.11
• npm (or yarn) version: yarn

Do you want to request a feature or report a bug?:
Bug

What is the current behavior?:

$ extract-messages -l=source -o server/lang -d source --flat 'src/**/!(*.test).js'
Error: Duplicate plugin/preset detected.
If you'd like to use two separate instances of a plugin,
they need separate names, e.g.

  plugins: [
    ['some-plugin', {}],
    ['some-plugin', {}, 'some unique name'],
  ]
    at assertNoDuplicates (/Users/stevenlangbroek/Code/ec_portal/node_modules/@babel/core/lib/config/config-descriptors.js:205:13)
    at createDescriptors (/Users/stevenlangbroek/Code/ec_portal/node_modules/@babel/core/lib/config/config-descriptors.js:114:3)
    at createPluginDescriptors (/Users/stevenlangbroek/Code/ec_portal/node_modules/@babel/core/lib/config/config-descriptors.js:105:10)
    at alias (/Users/stevenlangbroek/Code/ec_portal/node_modules/@babel/core/lib/config/config-descriptors.js:63:49)
    at cachedFunction (/Users/stevenlangbroek/Code/ec_portal/node_modules/@babel/core/lib/config/caching.js:33:19)
    at plugins.plugins (/Users/stevenlangbroek/Code/ec_portal/node_modules/@babel/core/lib/config/config-descriptors.js:28:77)
    at mergeChainOpts (/Users/stevenlangbroek/Code/ec_portal/node_modules/@babel/core/lib/config/config-chain.js:319:26)
    at /Users/stevenlangbroek/Code/ec_portal/node_modules/@babel/core/lib/config/config-chain.js:283:7
    at buildRootChain (/Users/stevenlangbroek/Code/ec_portal/node_modules/@babel/core/lib/config/config-chain.js:68:29)
    at loadPrivatePartialConfig (/Users/stevenlangbroek/Code/ec_portal/node_modules/@babel/core/lib/config/partial.js:85:55)
error Command failed with exit code 1.

What is the expected behavior?:
We're running babel 7 in our project, so I followed the instruction re: babel-core@bridge. Unfortunately the error still persists. I added some logging, and name in the assertNoDuplicated function is empty (these are added to a map to verify lack of duplication).

Suggested solution:
I'm not sure why it's still using "@babel/core" instead of babel-core, despite babel-core@bridge being installed. Any thoughts>

[akameco]

@StevenLangbroek Fixed. We dropped babel 6. You do not need babel-core or @babel/core.