fix(core): fix circular dependencies (#411)

* chore(eslint): add import rules

* fix(select): fix circular dependency

.eslintrc.js

@@ -6,4 +6,8 @@ module.exports = {
         cy: 'readonly',
         Cypress: 'readonly',
     },
+    rules: {
+        'import/no-cycle': 'error',
+        'import/no-self-import': 'error',
+    },
 }

packages/core/src/Select/MenuWrapper.js

@@ -3,7 +3,9 @@ import { resolve } from 'styled-jsx/css'
 
 import propTypes from '@dhis2/prop-types'
 
-import { Card, Layer, Popper } from '../index.js'
+import { Card } from '../Card/Card.js'
+import { Layer } from '../Layer/Layer.js'
+import { Popper } from '../Popper/Popper.js'
 
 const MenuWrapper = ({
     children,