preferred alias errors on toString

[SpainTrain]

Once #115 was closed, we began seeing this failure:

/home/ubuntu/hz-webapp/app/components/buyer/offer/compose-helpers.js
   79:12  error  Method 'toString' is an alias, for consistency prefer using 'function toString() { [native code] }'  lodash/preferred-alias
  106:20  error  Method 'toString' is an alias, for consistency prefer using 'function toString() { [native code] }'  lodash/preferred-alias
  109:17  error  Method 'toString' is an alias, for consistency prefer using 'function toString() { [native code] }'  lodash/preferred-alias

/home/ubuntu/hz-webapp/app/components/common/readonly-field.js
  64:71  error  Method 'toString' is an alias, for consistency prefer using 'function toString() { [native code] }'  lodash/preferred-alias

The native toString method is of course not a lodash alias and arguably this conflicts with prefer-lodash-method.

Here's a minimal repro

import {toString} from 'lodash'

toString('something')

3:1  error  Method 'toString' is an alias, for consistency prefer using 'function toString() { [native code] }'  lodash/preferred-alias

[ganimomer]

Fixed in 2.1.7. Thanks!