Extension automapping

The auto mapping where scoped

{
  "scopes": {
    "./node_modules/lodash/": {
      "lodash/union": "./lodash/union.js"
    }
  }
}

They are now properly put at top level when they should

{
  "imports": {
      "lodash/union": "./lodash/union.js"
  }
}

What's Changed

• Extension automapping fix by @dmail in #43

Full Changelog: v2.3.1...v2.3.2